I am generally in agreement with this, but I think it's only fair for you to share what you do instead of coming in just to criticize others.
You bring up a lot of good points and questions, all of which were in my mid as I decided to make this post. I think everyone has to to this conclusion and question what they have established in their minds (this is how my "Socionics journey" went, if you will), but it's possible only certain types (not Socionic) of people will indeed question the validity and consistency of the terms both used by "sources" and by the community. Whether or not they are isn't the ultimate question that everyone will arrive to the same answer, but I do think it's imperative that everyone does question and come to a well thought out answer.
More and more I lean towards this, because I find there will never be enough motivation or ability to test Socionics, and if so, anyone can ultimately say anything "inspired" by Socionics' writing. This is what I'd like this thread to be about, I'm curious to know how everyone came to their current understanding and application of Socionics, or at least have people start asking themselves this question. Though, it might turn some discussion moot in others' opinions, which wouldn't be ideal since there are people who think there is a general right way and general wrong way to do this.
Your own subjective understanding how Socionics and how you deal with things such as Socionics will be the foundation of everything you learn, and it's hard if not impossible to get rid of it, and it's almost unnecessary to. To have it be the focus, well, that's debatable, but that might just go under having a different interpretation like you mentioned. Even Labcoat goes along with a rather predictable manner of responding to certain posts (this isn't to call him out, but rather say that even someone who brings up that you can't allow your instincts to rule your understanding, you ultimately had that instinct already. It's just not completely a bad thing). The only thing I've come up with is to come up with certain criteria and make sure you follow them from the beginning, and then update each time you learn something new.