They have round the clock nannies and tutors so they never have to deal with the kids. Sometimes they might see the kids at dinner or on weekends, but really it's the nannies that raise the child.
I'm not saying Marc is that kind of person, but he might be. Or maybe his spouse does most of the child rearing.
In Marc's defense, the schedule presented here is pretty family compatible. He has lots of free time in the evenings.
For anyone wanting their children to be a legacy of themselves, the (blatantly obvious) irony in the above is that the less time a parent spends with their child, the less actual legacy they're leaving of themselves. Having other people raise your children means the legacy being left is that of the nannies or tutors or grandparents or teachers or the child's friend's parents.
If they don't see who you are and how you conduct yourself, they won't be filling your shoes.
But reverse-ironically, they'll probably be just as absent for their children, so there's a little inevitable legacy that will be passed on.
For many, they don't want to sacrifice this. For example, I won't, even if I _really_ want to. So if I want to succeed, I need to optimize the heck out of the free time I _do_ have.
Bill Gates famously took weeks away in a cabin to get work done. Ruth Bader Ginsburg would work like crazy during the week while spending some time with her young child during that time, only to sleep the entire weekend to catch up.
I'm kind of the opinion that there is no such thing as optimizing your time, only the way you distribute your energy and focus.
Allocating time to do something is meaningless if you've already spent all your mental energy on other tasks.
For most people, free time = a break. So if you're already using 100% of your energy on other things and also expect to be productive in your free time... I'm don't think it adds up.
This. People constantly say they only have 24 hours, I felt I have ample of time. But my energy doesn't replenish as quickly. Human are not machine, you have to optimise your energy usage. Try to play a game of Go for hours and you have absolutely zero energy left for the rest of the day to think about anything. May be their are super human that can do that. I certainly cant.
My guess is that it is similar to that some people are very good at long distance running. While I prefer to sprint, walk, run, and sprint again. Where walk = resting.
To me stories like that just play into the dangerous idea of magical voluntarism in our current culture
If it was just pure hard work alone that determined success, the women of Subsaharan Africa would all be billionaires. Necessary but not sufficient. (Side note: Africa will become rich by the end of the century.)
That means either divorce or alienated wife that is with you solely for money/livestyle long before the have time part happens. And even if not, if you spent all the time in work for years, adjusting to something different is hard.