Do men abandon their families or are they officially or defacto expelled from them? A little of both but historically, modern times though a lot of the latter. Women against 50/50 are the expellers, as is the government. Less government influence in involuntary dis-equal custody rights is better.
When I was a young man I met a lot of men who were expelled from their homes and had never done anything wrong but either not be wanted by their mates anymore or not want them. That would tend to emotional stunt someone. He is now a slave with difficult access to caring for and protecting his kids the woman is possibly with a new man she hooked up with before she the old one out.
There was a song about it. “She got the goldmine I got the shaft”.
I am sure there is much more to this than meets the eye but none of it will make women better than men.
Being any absentee bread winner is a little like being expelled from your home(kids). Doing that with the risk that the courts would guarantee your expulsionin in the case of a dissolution of the marriage wouldn’t feel very powerful at all.