Oh for fucks sake!!! Jesus fuckin’Christ! Do YOU personally have any experience being married or having kids?
Culturally, religious people are dominant in our society. Western culture is predominately Christian. Do you know anything of their teachings? A woman is the “compliment” to a man. The man is the head over the woman, as Christ is over HIM. This is reflected pretty much everywhere - from jobs, pay, “roles” (stay-at-home-moms to working moms)…so it’s reflected in the courts too. You get a male who has mostly worked and she’s raised the kids, so yes, that mostly continues after divorce. There are lots of parts in this and both mates can use “power plays” against the other - money vs access to kids.
A parent can be a good parent regardless of finances, two or single households, number of kids, etc. They can be a good parent regardless of mental or physical issues (affecting them or the children). AND likewise they can be shitty given the best of “circumstances”.
God - human interactions are not clear cut, one above the other, etc.