It's really only fucked up without consent. Forgetting isn't inherently a bad thing. Especially if it can help you get over trauma. That being said there are several ways how this could go wrong
Yes, forgetting isn't necessarily a completely bad thing, but it kinda is in this case since the one that will be forgetting things would be doing so that she can forget the trauma a man caused her and will probably still have to spend time with said man.
Like I mentioned in my previous posts; it's like taking drugs or having a lobotomy.