But non-profits aren't a regular business and their ultimate obligation is to their charter. Depending on just what the level of misalignment was here, it's possible that the company becoming nonviable due to terminating Altman is serving the charter more closely than keeping him on board.
No one posting here has enough detail to really understand what is going on, but we do know the structure of OpenAI and the operating agreement for the for-profit LLC make it a mistake to view the company from the lens as we would a regular for-profit company.
In any lens if microsoft pulls their GPUs and funding, then OpenAI is through.
No, pissing microsoft off in this situation is not a good idea. Because microsoft can shut the whole organization down.