“Musk says” is a phrase that needs to be treated properly: as an injustice against the poor letters trapped within it and not as anything approaching meaning.
I mean, he suggested it, Zuck responded, and now he's doubling down. He has a pretty solid track record of doubling down on stupid decisions and embarrassing himself.
More of a history of doubling-down in front of everyone while trying to find loopholes to get out of it behind the scenes, finally being forced to do it kicking and screaming THEN embarrassing himself.