Let’s get clear on what Twitter’s rebranding to X really is: a political project from a right-wing reactionary. https://www.platformer.news/p/twitter-becomes-x
Loevinger's stages of ego development could explain, why Musk is not "dumb".
The theory describes the maturation of a person. Trump and Musk never left the premature phases. They are still somewhere between Impulsive E2 and Self-Protective E3 (maybe Conformist E4, but I doubt that).
And while Trump has a really low IQ, Musk doesn't. But it is not helping him, because he is a child in the body of a grown, intelligent man.
And he will always be.
https://en.wikipedia.org/wiki/Loevinger's_stages_of_ego_development