[apparent]

> I'm sure there is a biological factor that can be proven to nudge this behavior in a certain direction, but I don't believe this should be seen as proof that some norms in society affecting most of the population are static and should be left unquestioned.

The notion that biology is merely a nudge in this context, especially when huge hormonal surges are at play (both at birth and with nursing) is just not accurate. There is a reason that in basically every culture in the world, for thousands upon thousands of years, mothers have been the primary nurturers.

Could it be different? Sure. But we should be mindful that there is a reason that societies have developed the way they have, and not set our sights on a "goal" of fathers spending as much time with kids as mothers. This ignores the reality that mothers are, on average, more inclined to nurture than fathers. We should not urge them back to work, nor should we pretend that fathers "should" be as nurturing as mothers. That is not in our nature, (on average) quite literally.