This is very down in the weeds, but let me provide an example.
>I'm going to place you under arrest, but if you give me your number, I might forget about it.
The power dynamic there favors the officer over you. If you don't yield to him/er, you could face prison. That demonstrates the issue with power dynamic leading to sexual harassment is that one with more power over the other coerces them into yielding sexual favors that they otherwise would not consent to.
Yes I understand that, but the power dynamic completely shifts when the powerful party shows interest. You might get yourself out of handcuffs by giving your or even a fake number if the powerful party is interested.