It's important that the board be relatively independent and able to fire the CEO if he attempts to deviate from the mission.
I was a bit alarmed by the allegations in this article
https://www.nytimes.com/2023/11/21/technology/openai-altman-...
Saying that Sam tried to have Helen Toner removed which precipitated this fight. The CEO should not be allowed to try and orchestrate their own board as that would remove all checks against their decisions.