Interesting to see someone on HN of all places equate longer hours with "working harder" or being more qualified for senior roles.
Speaking from personal experience with a cohort of Millenial dads: a lot of "women working less to prioritize family" comes down to women being expected to be caregivers and men typically not having experienced the same socialization from a young age and feeling overwhelmed, thus retreating into work to both avoid care work and be able to justify it by being "the provider".
It's pretty telling when we chastise women for "not pulling their weight" at work when they're also typically expected to do most of the household chores, social labor (e.g. keeping track of birthdays, relationships and preferences throughout the family's social circles) and caregiving but don't call out deadbeat dads like Elon Musk who sire new children left and right while being completely incapable of maintaining a relationship with any of the mothers and abandoning any child that calls him out for his bullshit once they get old enough to form an opinion. And as a reminder: Musk holds several official positions including multiple C-tier ones and still spends an ungodly amount of time shitposting on Twitter. If you think that the time he spends on any one of his jobs on average accounts for more than the equivalent of a 4 day work week while also being this heavily distracted and spread thin, you're being ridiculous.