Twitter was the center of the Arab Spring. There's plenty of powerful people in the world who would be happy if it went away. And the users migrating to Facebook, a platform far more friendly to censorship favoring existing power structures, is probably also desirable.
All these weird 'genius play' defenses really are hard to follow, people make mistakes, even Elon Musk and if he had been able to walk away from it he would have.
Plus his idea of X as "everything app" means Twitter will not exist as such anyway, ie. at best it'll be killed by quickly transforming into something else. The rumors that it will require ID verification seems to support it. Instead of a single common space it will be balkanized between nations so that he can satisfy everyone by showing different content (ie. if you verify as Chinese you will see only pro-CCP propaganda, same with Arab countries etc).
Pride can be deadly....