Well, I feel Rey is believable but even if she weren’t I think it’s ridiculous that it has to be because of a PC agenda. Most blockbusters feature unbelievable male protagonists. Don’t see people complaining about gender politics there.
I can’t think of a single male character that could magically pick up so many unlearned skills like Rey does in TFA, i’d be the first to criticise him if I could, regardless of gender.