Men's Group

Gone are the days when women are expected to stay at home with the kids. Certainly there are fringe groups (mostly social conservatives) who still have that expectation, but they are a small minority. Feminists have done a good job of promoting the idea that women should have choice in that regard and the idea is well accepted by society. Men don't have that advantage. Nobody has been promoting the idea that it's OK for men to have options.

Furthermore while it is true that some devalue women for staying at home, it isn't many. For the vast majority women don't devalue women for staying at home. There's undoubtedly more men that devalue women who stay at home, but still it's a subset of all men. You can't say that about stay at home dads. There's no shortage of men and women who devalue men who stay at home. Understandably you don't, and that's great, but not everyone is like you. Again this goes back to the reality of feminists promoting the value of women in both traditional and non-traditional roles. Men don't have that working for them.