Are normal adults not "working" in a similar way to your kid for 15+ hours per weekday?
Comparable adult parent things would be up at 6am, prep kids for school day, in the office by 8am, 8 hours of work plus a lunch, departing the office around 5pm, transporting kids to/from some activities, dinner, helping kids with homework, somehow fit in regular shopping needs (food, essentials, etc), maybe some volunteering or hobby things, if lucky in bed by 10pm, and we're easily at 15 hours of "work" on a weekday.
Yes, it's a lot.
we wake up at 7, prep the kids to school, they walk there alone then, we have coffee together, then I drive to the office by usually 9:30. have a proper lunch break with colleagues, then in the office until 6pm or so, then drive home, have dinner, put the kids in bed by 8, then we can watch a movie/do hobbies/etc.
while I work, my wife can do the shopping and take care of other household chores if needed.
Naw. Adult life is so much easier with regards to competitive pressure compared to getting into a good college. The real world is Pass/Fail, much to the chagrin of plenty of HNers.
That's also assuming you have children. I'm childfree and most days are all mine once I punch out unless I've got stuff to triage here and there.
Children are part of hobbies.
Very challenging at times, but for example I sleep with my kid hugging me, or I chat with them while in the car, or we do chores while watching tv or something like that. And not every day is packed like that, you can tell your kids "no more than 3 times per week of activties, the other 2 days are for playdates", and that should be acceptable.
There are horrible days of the week, but it's not daily 15 hours of work. That's training for slavery.
Homework for break and homework for weekend should be STRONGLY ILLEGAL.