That being said, this is a case of biting the hand that feeds you. An equivalent would be if a nonprofit humiliated its biggest donor. The donor can always walk away, claiming her future donations away, but whatever she's donated stays at the nonprofit.
I'd guess, OpenAI without Sam Altman and YC/VC network is toothless. And Microsoft's/VC/media leverage over them is substantial.
Why would they care about that?