I don't think it's inferior at all.
There are, as I see it, two extremes here:
1) Use traditional roles, including the woman doesn't work.
2) Everyone does everything 50/50
Neither, if imposed from the outside, is good.
It's a hard problem in general that people don't know what they want, or what they need to be happy. Women (or men for that matter) who stay home with children are told (implicitly or explicitly) that they "should" go out and work may become unhappy if they do this.
And they can become unhappy not because they don't do what they want, but because they are treated like, or even start believing, that they "want the wrong things". And it's not just that other people say it. It can be the case that they genuinely don't know if they would be happier doing something else.
Try not wanting to have children at all. Parents, family members, and even complete strangers will tell you that you are not happy, that you want the wrong thing, and they'll pity you.
Then there's the "it's selfish of you to not work as a woman, have children, be an breadwinner as a man", etc..
That's worse. That's admitting that the advice you're giving would make that person less happy, so that they will fit in to the advice giver's world view.
In the end I just want people to have control of their lives. I can try enabling their freedom, but I can't make them make good choices.