[Itse]

It's not really about the power imbalance as it's about the way people handle that. In many of these cases, either the perpetrator is giving no hints whether or not they would use their power against the victim if they refused their advances. Quite commonly they are even explicitly or by dropping strong hints making it clear that they are absolutely using their power as leverage to get what they want, and that's flat out abusive behavior.

People in power should act responsibly with it.

If you're trying to innocently make a pass at someone you have power over, you need to take extra steps to make sure the other person does not feel threatened or pressured. Otherwise you risk being an abuser.

If you're a person with status but not much actual power it's not as clear how much effort you should put into defusing that experience of a power imbalance, but it's still something people should be aware of. Especially if the other party is clearly younger.