@alearose I do think you're really onto something to point out the impact of technology - I do believe that is a linchpin to everything we think and do. However, I think the impacts of technology have been far greater in the arenas of (a) military, and (b) white-collar careers than they have been in (c) SAHP-ing.
I think there's a strong argument that while it may have made sense for Roman Legions to be men only, technology has dramatically reduced the biological advantage or rationale for choosing men over women as fighter pilots or radar operators.
Similarly, I think there's a strong argument that while it may have made sense for coal miners and steel workers to be only men, technology has dramatically reduced the biological advantage or rationale for choosing men over women as crane operators or lawyers.
So both of those (^) are "Pull Factors" for women entering those arenas. I get that.
But help me out here - because I really don't think we can say the same thing with regard to newborn, infants, and young children. Biologically, neurologically, psychologically - a newborn is still working on the "hardware and firmware" developed by evolution hundreds or thousands of years ago. And so are the mother and father. So if we entertain any theories that newborns and women have evolved specialized biology, neurology, endocrinology, or psychology capabilities and systems ... then those capabilities and systems are still in full effect today for newborns and mothers ... and fathers don't have those specialized capabilities and systems.
There are no comparable "Pull Factors" for men entering SAHP-ing.
So, acknowledging baby formula as a substitute for breastfeeding - it would be surprising to me for us to expect that (a) there is no evolved specialization relevant to newborn, infant, or young-childcare; or (b) that evolution is keeping up in real time with our technological advances.
I'm eager to hear you thoughts on this.