alt Hacker NewsPhrases like "she slept her way to the top", "she doesn't belong here", etc, are exactly the sort of rhetoric that leads to women's reports of assault being automatically dismissed. It's definitely dangerous. Ask the women in your life, I bet they'll agree.
I understand your concerns but I'd argue that it is a bad idea to make it so that women are automatically shielded from any kind of scepticism. There is a sensible middle ground here between "All women are lying harpies" and "Women can not be criticized at all without it being dangerous and misogynistic".
I think it's also important not to conflate an accusation somebody of benefiting from a partner's nepotism as equivalent to accusing them of sleeping their way to the top just because they're a woman.