I'm pretty sure from your style of writing that you are not an INFP. You sound much more like an INTJ, as the tests have suggested. Typically an INFP wouldn't start a thread with a command: "Don't do this or that.". Even starting a message with "share the links." INFPs don't usually talk like that, and you seem to do it naturally. So the tone of how you write doesn't seem very INFPish at all. As someone else said, "confused INTJ" sounds about right.
Having a thinking preference doesn't mean that you can't have feelings or a soft side, or feel bad when you accidentally hurt other peoples feelings. It's more about what your default way of thinking is, and clearly you're looking for objective information to help you decide right now, for example, and not peoples thoughts or opinions, for example.
Or knowing something and then having to find more info to confirm it. That's sounds more like Ni. An INFP is more likely to be indecisive, doing all kinds of research to help themself decide and make some decision. You say you will never learn about something if there is no chance of using the knowledge to your advantage, whereas INFPs are often interested in all kinds of arcane and abstract things that do not have immediate practical uses. The INFP's extroverted intuition likes sifting through information looking for patterns and things, which is kind of the opposite of your preference, it seems.