I do understand your point.
I think if a user wanted to say change from Mastodon, to BlueSky they are free to do so. Or to Facebook.
Twitter gets a lot of bad rep world wide in general because of the owners politics, and also that they allow a lot of hate speech on their platform. and it's not just regular people, but legal officials.
If Musk leaves Twitter, that doesn't necessarily mean Twitter would change it's ways.