Chimney Swift
i am confusion
I agree with everything in that statement except the MBTI bit. While I think it to be ridiculous that someone would require you to have that, having a Myer Briggs Type for your character can actually be kind of helpful to keep your character consistent. The first letter can give you a rough idea of how they interact with people, and the last three letters give a pretty accurate description of how your character reasons or what their thought process for many given situations would be. Obviously, like you said, this wastes people's time on a character sheet (and anyone with any sense could probably just figure it out on their own through dialogue), but the types themselves at least help somewhat in terms of insight on that character and can be a useful tool to use on your own.
I agree that it can be helpful for the player to gain a bit more understanding of the facets of their own character's personality, but as a simple 4-letter score on a character sheet it tells the other players nothing. One ESTP may be vastly different from another, for example. That's why I always prefer to write out personalities in paragraph form or simply improvise until I have a solid ifea of where I want to go with my character.