No, I'm not saying we should just ignore questionable power dynamics. I'm saying we shouldn't use our power to stop people from having relationships.

Advise? Question? Monitor? Be concerned? Sure!

But I think you cross a line using your job authority to stop a relationship. Each member of the adult couple is an independent moral agent, and nobody other than the two of them should have the power to force them to break up or not get together in the first place. This is this essence of personal liberty and human rights.