So while you’re right that Sama isn’t crucial to OpenAI, I think a lot more employees are aligned with Sama’s vision.
If that "vision" is the thing that you're worried about, because you think rapid commercialization is actively dangerous, then you may very well have a reason to want to completely blow up the commercial side of OpenAI. Even if it gets reconstituted elsewhere, you've at least created a speed bump by forcing it to get reconstituted.
It's inconvenient that in the medium to long term that means you wind up with fewer GPUs for the True Cause(TM), but at least the people you have working on it believe in that cause, and at least you haven't actively accelerated some destructive outcome.