Haha, yep. It’s good to see that someone else has considered these things as well. 1) seems to be a big issue in the MBTI community. People tend to use type to justify unhealthy behavior. But that’s another rant for another day.There are two factors at play:
1. Everybody sees the INFJ description and the "feeling misunderstood" part and "special" and it is easy to "identify as INFJ". It's a fashionable item. It's an easy fix for anyone that doesn't want to search into the reasons of why they are having a difficult time being understood or perhaps changing their ways or perceptions. Pick INFJ, if you are feeling misunderstood, easy fix. Fixing your shortcoming is hard, and nobody has time for that, that would take away from Facebook and Snapchat time. By the way, you can quickly remove from the list of INFJ anybody with Snapchat that is active daily, because that does not look like high Ni, low Se at all.
2. INFJs tend to flock to internet forums. It only creates the illusion that there are many. How many do you know in real life? I only know one. Not to mention that actual INFJs count, not the self-titled INFJs. To tell you the truth, I am not absolutely convinced that INFJ is an INFJ. The only one that has been tested and retested is myself. So, I only know one INFJ IRL, myself. It could be possible that some cultures have more or less than them. I can imagine the US having more of them than... North Korea for example. The environment plays a factor too.
I am not convinced INFJs are not the rarest. I read somewhere that 0.5% of the population are INFJ males. That is a very low number indeed. I can't find the stupid article.
It doesn't matter that much anyways.
The stats that you speak of can be found on the MBTIonline site (after you pay for and take the assessment, of course). If I remember correctly, INFJs are 2.7% of the population (or something like that... I’d have to double check)