It is rather counterproductive if, for example, I spend all my energy to help someone, they then experience no self-efficacy and I end up sick and exhausted.

The work of a bodhisattva is never done until Buddhahood is attained ;)

Do you have an explanation for this?

I think that there is an imbalance in what we consider important in our cultures. Raising a child is one of the most important and difficult things, but we don't value it the way we value someone who does something in science, politics, technology, sports, etc. It may not necessarily have anything to do with gender. It just so happens that in our division of labour, women took care of the household and men could go out there to explore and do things. So traditionally, there have been more opportunities for males to do something that seems impressive. Of course, this division of labour has changed to a certain extent, but not the value we place on parenthood vs other activities.

Body vs spirit? Another rabbit hole! ;)