Because of the power imbalance you can never divorce the two, even if she chased him.
That’s not a moral judgement, just a reality that “perspective “ matters here and if she chased him and then decides 3 years later that he unduly promoted her to try and convince her to have sex with him, BOOM he’s screwed, because she’s got a valid point.
I don’t know the answer, but he’s definitely doing things he shouldn’t.