To be fair, no user "owns" their account. Everything about your Twitter account, from the user name to the data you tweet belongs to Twitter. I hesitate to call it a dick move. It's more of an Elon move.
Right. Although I don't support it, but if the logic is that they can supress stories and say you don't have a free speech on a private platform, then they can take away your handle because technically it's theirs.