The short answer to the question is that they wouldn’t be #MeToo victims and wouldn’t enjoy all the publicity resulting therefrom.
The liberals decided that Mike Pence’s rule is discriminatory against women.
Reason being, for career advancement, there are supposedly times you have to be alone with a mentor or boss, or times you have to take business trips together, and the liberal view is that people such as Pence won’t hire or promote women, due to this rule of his.
Whether that’s true of his hiring practices, I don’t know. I’m just saying one reason why the liberals dislike Pence’s rule. They hate him anyway so it could well be that anything he supports, they oppose as if by knee jerk reaction.