Twitter/X: I'm smart? Seriously? That's not how I think of it at all.
I mean, yes, there are some people trying to use Twitter to show that they're smart. But my impression is that the overall vibe of it is trying to show that you're influential. People follow you. They retweet your posts. That's the "success metric".
Note well: I'm not actually on Twitter. This is my impression from outside.
Facebook/Insta: I'm cool!
Twitter/X: I'm smart!
LinkedIn: I'm successful!
Tik Tok: (I have no idea)
As long as you know this, it all makes more sense.