A woman can either have just kids, or just a career.
A man can have just kids, just a career, or a career and kids.
Who has more options?
Your assumption that women "choose" to always be the stay at home parent is questionable, too. As if the husband, and society in general, have no expectations that women are the best caretakers and should therefore be the ones to stay at home, and no additional influence on her choice.
A woman can either have just kids, or just a career.
A man can have just kids, just a career, or a career and kids.
Who has more options?
Your assumption that women "choose" to always be the stay at home parent is questionable, too. As if the husband, and society in general, have no expectations that women are the best caretakers and should therefore be the ones to stay at home, and no additional influence on her choice.