I absolutely would say that to a billionaire, because they aren't paying me.
My boss, have said it a number of times. I've almost verbatim told them that their use case doesn't line up with our broader user bases' use case, and that I wasn't going to support it. Part of a healthy working relationship is being able to push back.
Ignoring my specific case though, what is your point? That people with power shouldn't ever face push back? Surely that's not your point?