> Who would take that over a job with a 401k that moves with you?

Just going to say that the perspective of having kids and getting to spend your time not working, or stressing about work, and instead spending it with family and raising your kid, doesn’t seem like a hellish job to me, and besides that it isn’t clear to me the father would be the “employer” in that context, rather both work in the way they agree to within the context of their relationship for the benefit of their child. Many men would like to raise their kids while someone else goes to work.