There is actual difference between threatening people livelihood and actually destroying peoples careers forever and actually using violence. Which afaik, Feynman is not accused of. He did misrepresented who he was in some of those relationships - by pretending he is undergraduate. That is exact opposite of using power, it is pretending you do not have it.

Those are completely different types of people. It is not that professors should sleep with students, it is that Weinstein went far far beyond that. Suggesting it is the same is minimizing what Weinstein did.