Journalists who would never, ever consider working for Fox "News" continue to give their work -- free -- to Twitter.
They surely know that they're supporting a business controlled -- and manipulated in ugly ways -- by someone at least as malign as Rupert Murdoch. They're giving aid and comfort to someone who hates journalism and amplifies anti-democracy memes.
They could, instead, use the fediverse and control their own destinies.
How can they be helped to grasp this?
Well, have you asked some of them why they're using it?
I bet they can help you answer your question.
@volkris @dangillmor , I have. They tend to agree that it's a problem, but not enough of one to prod them into leaving. I'm reminded of the classic Dead Kennedys album title "Give Me Convenience Or Give Me Death".