Earlier quoted context omitted.
We know many things about Musk because he's a well known public figure which has attracted the attention of plenty of investigative journalists. But what do you know about the owners of the Mastodon instance you registered your account with? Are they accountable? Are they sensible? Are they competent? Do they even have a real identity?
You say this like he's quietly minding his own business and some pesky journalists are revealing what a dickhead he is. That is not the case, he is outspokenly a dickhead. He wants to broadcast what a dickhead he is _so_ badly, that he bought the worlds foremost social network to control the medium.
So yeah, Musk gets investigated very often so we know things that he would rather keep hidden. Now what about your Mastodon admin with an anime profile picture?