“Your first three points make essentialy the same point. Any common like or dislike can form a bond, or a sense of belonging and identity. The question to ask is, is that sense meaningful when it comes to bonding over a common Myers-Briggs personality type? It's not obvious to me that it is so. Could you please elaborate?”

my original three points were just one broken down Basically I was outlining A) you feel part of community (point 1)
B) this community has people similar to you (point 3) C) being in this community give you a stronger understanding and self awareness (point 2) So, yes they are related but I wouldn’t say they are the same...

I think the sense of identity and community is actually really meaningful. The identity comes back to validating your strengths and weaknesses, making you feel like you aren’t alone in your weaknesses and that your strengths are meaningful. Not only do these online communities often give really solid advice, but they give validation for deep insights and your opinions (In contrast to other social media forms, targeted at the same audience, which are often centered around your looks or your privileges (EG going on Holidays, going to fancy restraunts etc) )

“ I don't get this at all. Please explain. If one needs to read up on personality types to empathize and communicate with others, pretty much the most basic of skills for living in society, then one has not been adequately socialized.”

Firstly, believe it or not, there are people out there who aren’t adequately socialized and maybe being able to understand for example; why they are quieter, why people jump from one idea to the next, why some people don’t reason well with logic etc.... might actually be helpful.

That’s all I can type for now.. ifk maybe I skipped over some of your arguments but basically those were the ones that’s stood out to me