Difficult things aren't interesting locally, you have to practice boring things in order to do interesting things in difficult subjects. Some kids do practice boring things if you just ask them, but most do not.
Especially in maths, there's not much to practice.
There's stuff to understand. And while this might be exhausting it's not boring and it's a very rewarding process in itself.
Or programming... What's there to practice?
Really. I'd like an example of something that's boring.
My impression is that if you follow the path of discovery and applying things in context, there's nothing that's really boring.
You have to push them, but push them right. That's a combination of coercion and encouragement and helping them avoid procrastination. There are hills to climb and they need helping over them to where the good stuff is.
I remember my eldest crying over ratios at the dining table. Then algebra at the kitchen table. Then crying again at real analysis in the pub with me. She graduated with a first in the end.
Such a bold claim coming from some who does not share their credentials on the matter.
My kid will do everything as long as it is interesting. My sample of 1 contradicts your claim, but neither of us are experts on the matter.