It's not okay for a small group of employees to try to impose their chosen morality, but it's okay for one person to impose his own morality on the whole company, because he owns the controlling interest in it.
More importantly, that same person who owns the controlling interest has no responsibilities or obligations towards the company as a whole.
Did I get that right?
And while we're on the topic of what each of us finds ridiculous, how about the fact that whenever someone suggests that a publicly traded company should do something slightly idealistic, people always bring up fiduciary duty towards the shareholders, but it gets overlooked when we're talking about one billionaire's "right" to drive his company's value into the ground by shitposting on social media, because "he's the owner, he can do what he wants".
Regardless of all that, one point that keeps being overlooked -- and at this stage of discussion, where it has been pointed out repeatedly, it's pretty obvious that it's being overlooked on purpose -- is that they're not trying to impose any morality. They're asking for two things: 1) hold Musk accountable for harming the company, 2) define what "no-asshole" and "zero tolerance" policies actually mean and enforce them.
That's not morality. That's common sense and consistency.
EDIT: Also, what's more likely to bring the company morale go down: seeing its owner sabotage it because of his ego, or an internal letter criticizing him for doing that?