I envy the free time students have, glad to see he's putting his to good use, reminds me all the free time I used to have but didn't appreciate at the time and likely will never have again until I retire.
But yeah FT work and kids leaves little left for amazing creations like this requiring copious amounts of free time which is something that gets more valuable when you have little of it, just unfortunate to only appreciate it in hindsight.
I was with you until this point. When you have kids, your time is not entirely your own anymore. You have duties and responsibilities to them. The "choice" was made 9 months or so before they were born, not in the moment.