It's a "need to know" basis, and I don't need to know your face, I don't need to know your gender, your age, where you are from, what job you have, I don't need to know your political affiliation, your religion, your other hobbies, what movies you watched, games you played, books you read, whom you follow, what communities you have joined. I don't need to know anything more than what the words in the post say.
When you "need" to know what is real you end up with social media like "BeReal" which is just an enormous privacy nightmare (requiring you to take photos at random times) just to make sure that people aren't editing photos or showing only the good aspects of their lives to the internet. Since when has "posting on the internet" become synonymous with a panopticon?
Do you know what that sounds like? The "feature" that lets some credit card subscriptions follow you across credit cards although you'd like to get rid of them thank you very much.
I don't want a global identity for all communities I'm part of. Joe from the bait and tackle group (i don't fish, is that a plausible fishing group name?) has no business knowing what games I play unless I personally tell him.
Moreover, that nice store that gave the bait and tackle group a 10% discount has ABSOLUTELY NO BUSINESS chasing me in MMO #245768.