I don’t think you read through the scenarios I wrote.
I did, but that's beside the point I am making, which is counter to your premise. I think "ideal matching" has a lot of value and not much harm.
This seems quite prejudiced and also incorrect.
Prejudice comes from a place of truth.
Darn, missed your INFJ-specifics there before you edited it out. Yes, everyone is different.
MBTI is Cognitive function, not exactly behavior.
There is correlation though. That's my point. And it's pretty definitive that many behaviors do apply to the vast majority of any specific type.
Could you please try to explain your statement from above: “Extroverts qualify others based on a wide range of superficial values” ?
I'd have to point to some examples. One that I've been following recently has been ENTP-related. ENTP seem to also score similarly in enneagram with 7 being a dominant score. This type likes to try new things, and has a personality that is quick to start but then quickly moves on to something new; gets bored easily and doesn't like to be held down to things. In relationships, this can mean a lot of different partners - whomever suited their fancy at the time. The connection wasn't something about the personality of their partner, it was more about what they could enjoy in the short time frame before they moved on - superficial things in general. Attempting to explore the depths of a person isn't a common trait for this type unless they really connect or grow out of that nature.
And, I'm not saying just MBTI, but personality metrics of all sorts are applicable for filtering out potential problems.
For example, I find it a turn off when someone has a lot of sexual partners. It's a huge turn off; I want a deep connection, not just "the next" connection. If ENTPs on average are seeking out lots of relationships and having lots of sexual partners to try new things and be their extroverted selves (which I have no problem with, each type is different) I can basically not waste my time; if I know someone is an ENTP, in general, their method of always wanting to try new things, if it extends to relationships, is not going to sit well with me. I can just avoid that problem - on average - by not considering ENTPs for a relationship. I save myself a lot of inner turmoil trying to make sense of how their world works, and I save them a lot of turmoil trying to understand why I even care and if they should leave me or not over it.
It's a win-win situation here. It's just one example, but there are many others, for many different types.
If you know how a certain type works in general, you can avoid dealing with that. INFP for example like being told what to do. They just want someone to say "go do this thing" and they go do this thing. If you don't want to engage with someone in that manner in a relationship, then you can avoid this type. This is a broad generality and someone might say they're different; not the point. Another easy to apply example: let's say you'd rather be spending time with someone who enjoys the moment with you versus always taking photographs of the moment - INFP are the ones taking the photograph of the sunset (or lots of other things) instead of simply enjoying it with their partner
on average. It's a trend among the type to do this. It's not bad, not at all, but if you want to avoid feeling like a secondary priority to the act of capturing the perfect picture that captures the feeling they are getting when they see something - which is super powerful and important to them - well, just don't involve yourself with INFPs. If you don't mind someone snapping photos all the time, then it's not a big deal, and you can in effect choose to deal with it or not in this way.
It's about being able to pick the things that might line up with your values, easier. If a certain type prioritizes certain things and you do not, it's a conflict you can avoid.
Highly sensory-experience types conflict with my inferior Se. So hanging out with a type that generally is into high-volume sensory experiences, I can avoid that and look for people who also share this, or balance me out in a different way. I get along really well with INTJs as long as nothing emotional is discussed, since we like to do the same dominant thing, and avoid the same inferior thing. This seems pretty good, and the problems we might face in a relationship are probably more to my liking.
This probably is more work than most people are willing to put into things, so it's not for everyone. ENTP for example couldn't be bothered to consider these things for the most part. They'll just try different things until they've found something they really like. But for those who think there's some value in not wasting their time, why not filter based on an ideal type or close to it? If your ideal Friday night is to go out to a club and dance and drink and get drunk, that's not representative of a lot of types in terms of their sensory function. Everyone is different, but it will help you avoid things that might conflict with who you are if you pay attention.
Want to get analyzed and inspected and have someone poke at your inner self? Find an INFJ - their Ni/Ti generally makes them really dig into who you are. Want to not have someone so concerned with these things? Find some other type.
When you browse these forums, you see a lot of patterns in types. Thousands of people who agree with the same thing, and express a feeling of belonging when someone of their same type "gets them." (note, very little extroverted activity relative to introverted) Extending this pattern to relationships and anywhere else makes a lot of sense. If you want someone to start off a project the right way, get an ENTP, but don't keep them on the project for too long or they will get bored. So it can apply to work relationships as well; an older family member who was in high ranking government positions took MBTI a long time ago and his position was redirected towards his interests from that. Like a long time ago. And he loved it (and is ENTP). So the value in doing this kind of filtering and prioritizing is there. It's just learning how to use it, and obviously not treating people poorly or just completely discounting everyone simply because - which is where there can be harm. Instead, if I know a specific type is unlikely to align with my values, maybe they just stay friends. No harm in that.