Someone doing something bad, like financial fraud or significant lying to the company is much different than a situation where someone is working 2 jobs and is asked to focus on one.
To describe the 2nd situation as being "fired" is dishonest. As it attempt to imply that there is some crazy hidden drama going on.
Admit that those 2 situations are significantly different.
Since you seem to have not been following this story, it is because that is the accusation that lots of people are making against Sam Altman.
The rumor, for years, was that he was fired for some sort of significant dishonestly or misconduct.
Furthermore, there is other context in which Sam Altman was temporarily removed as CEO from OpenAI, for the stated/claimed reason of not being consistently candid with the board.
The obvious comparison that everyone is making would go something like "Well, there is this rumor that Sam got fired for dishonestly in the past, therefore it makes sense why he got fired again at OpenAI for dishonesty".
Paul G's tweet is a refutation of and in response to this context that is clear and obvious to anyone who has been following this story.
The thing here is, a lot of people have (for reasons I cannot really fathom) invested some of their identities in the idea that they have worked out the bones of the whole Sam Altman story, and the First Commandment of Message Boards is "I'm not wrong".
Is it that hard to fathom? The internet likes to play teams with these personalities, it does it with Musk and Lisa Su and it did it with Marissa Meyer, etc. It's just waves of hating / hyping.