And anyone can always delete and retweet, too. The "problem" this solves is that narcissists measure their self-worth by tweet metrics and are desperate not to lose them.
It's not a coincidence that this is happening as Musk buys his way onto the Twitter board and riles up his followers about his first pet feature.
But as for the whole "3 days before he bought the shares" - He's been accumulating for far longer than that and even the CEO of Twitter mentioned they were in talks with Elon about being on the board "in recent weeks" [1]
With that said, yes it may be manufactured coincidence mostly driven by the new CEO change and not by Elon buying shares
1: https://www.cnbc.com/2022/04/05/elon-musk-spent-2point64-bil...