Whether it's right or not, I don't think the players would have enough respect for a manager who has managed a women's team, given the fact a top international women's teams can't beat an under 15s boys when they play against them.
That's not disregarding women's football or having a dig at it and it's not to say that someone who manages in women's football couldn't do well in the men's game. But you have to command the respect of a dressing room to succeed. I'm just not sure how much respect a woman who managed a woman's football team would get from a dressing room of League and Champions League winners from the men's game. That's just being realistic.