It might be harassment.
It might be blackmailing.
It might be a lot of nasty, disgusting, and even criminal things.
In the above story, the partner was obviously a complete prick.
But the scheme is inherently different from a rape. This abusing prick could've asked both men or women under his supervision for a number of completely unreasonable favours, whether sexual or non-sexual, declining of which would've been similarly catastrophic for the career of his staff members because of the power the abusing partner held over the matter.
But they could've walked away. Maybe they could have restarted their career elsewhere or had to change careers, I don't know. Life isn't fair. But they could've walked away and from what I understand, so could've this young associate in the law firm.
I think the very definition of rape is crossing the very line where the victim is not allowed to leave and forced to be abused instead. A rape is a physical act of violence, regardless of whether what happens is an intercourse or a blowjob or whatever and whether the victim was physically threatened by fists, a knife, or a gun, but the physical nature of the act means if you are able to walk away the rape doesn't happen because it can not happen. And that is for the same reason why a robber with a knife can't kill you unless you're within a few feet of him. A knifeman can't kill you a block away and a rapist can kill you if you're not there.
In some jurisdictions coercion might translate to non-physical threats. Then maybe there it could be classified as a rape. It's still as wrong as if it's classified as something else. But the dynamic of that situation is nevertheless different from the dynamic of a rape with the latter interpreted in the traditional sense. There is a line between situations from where you can actually walk away and situations from where you can not.