Once the marriage form of female obedience to male obedience is formed, the responsibility of the man you mentioned will follow. On the man's side, parents are biological parents, who will raise them? Of course it was raised by my own son! Foster parents are the bounden duty, so why raise a wife? Don't the man's parents want to have grandchildren? Who will have grandchildren? Daughter-in-law, can't you have a wife? If you have no wife, if you have no children, your parents will never stop being with you! Besides, women are a "vulnerable group" (fallacy). Do you want a "vulnerable group" to support you? So parents, wives and children are your business.
Why do so many people regard women as a vulnerable group? There is another important reason besides that women are weaker than men in physical strength and other physiological aspects. Because girls are not as popular as boys from birth, they are labeled as "useless" from the beginning. Because you can't afford to raise your parents, you are useless, nothing, nothing. It seems unreasonable, but it can be explained psychologically, that is, the "halo effect".
Therefore, I believe that the root of inequality between men and women lies in two points: the tradition of women following men and the problem of providing for the elderly. It is a legacy of feudal society that women come from men, and now it is not a feudal society. Why can't this tradition be changed? The reason is that the man's parents don't want to change, and they want their son to give them a pension. It is the insistence of the man's parents that keeps this tradition. To change this tradition, we need to improve social welfare undertakings so that parents can enjoy their old age even if they leave their sons. This will change the concept that women are subordinate to men and alleviate the problem of excessive pressure on men. But I'm afraid it's not that simple to improve welfare ... we look forward to that day.