For SpaceX that may well be true - I don't think anyone will ever want to get on one of his Starships to go there, because it looks like a horrific way to spend 6 months, if the technology ever even becomes capable of doing it. That's another thread though.
He didn't start Twitter, obviously, and doesn't give a crap about free speech. If he did, he'd have just made his own one for a few millions dollars and not wasted BILLIONS buying one for a price well over any sane valuation.
Now, all that happens is people get stuck in tunnels in Teslas instead of on the roads. You know the best mass public city transport system? Trains and trams - America hates them though, everyone must have their own car...
My bad, obviously he bought twitter, his stated reason for buying it was that he was unhappy with how it was being run and feels there is a huge importance for humanity in our ability to discuss things. Twitter is the place people discuss things, you can't replicate the user base.
Elon thinks quite deeply about things like this, his reason for going to Mars is that humans will go extinct if we're only on Earth, inevitably due to an asteroid or nuclear war. He thinks AI is extremely dangerous which obviously it can be. His views on Ukraine are largely based around humanity not going extinct as well.