Someone who's in a position of authority or power doesn't have to worry about gaining said authority, while someone who's not very often does. Rationally, the two situations are equivalent. (Psychologically they aren't; there's a cognitive bias that causes people to weight losses higher than gains, but there's also a cognitive bias in others that makes it easier to avoid losses than enact gains, so they roughly cancel out.) You can't draw significant conclusions either way along this dimension: the willingness to sacrifice authenticity for power is a mark of the security<=>insecurity axis, not power<=>powerlessness.

I don't know that those two axes are orthogonal. It seems like there is an asymmetry between gaining power and losing power. I think we can agree empirically (if not definitionaly) that there are fewer people with power / status. There are a lot of things besides not offending those others that keeps people in a position without power. If you know that these other factors are keeping you low status, then you have less incentive to pretend to be something you are not. But a single offensive comment can sometimes dislodge someone with power.