Itβs not complicated: Elon can do whatever he wants with Twitter, just as Twitter could do what it wanted pre-Elon.
Then, Twitter wanted to build a space aimed at inclusivity and avoided disinformation. Musk wants to build something different. https://www.washingtonpost.com/politics/2022/12/16/elon-musk-twitter-trump/?itid=ap_philipbump