Here is your error. "Abuse of power" + "sexual advances" = "sexual harassment". It's not a difficult concept to understand.
If Bill tried to cuddle with Margeret Thatcher, there would be no sexual harassment, because Thatcher could tell him to fuck off with no legal or employment ramifications. Not so with Lewinsky, and of course both of them knew that, even if they both said it was consensual.
This is why politicians with small girl children have been seen to not let Joe Biden get too close to the girls. The girls knew Joe is VERY important, so when he touched and sniffed their hair you can see on the many film clips they were obviously uncomfortable, but didn't pull away because even those young girls knew there would be ramifications if they did.