As I mentioned before, humans are intrinsically motivated to do things. You should see how my kid tries to put on his own shoes every day before I offer to help. He'll get it someday, and I don't need to push him for him to figure it out on his own. Humans also like to be liked by other members of their society. It's good for us to do things for each other. Yesterday, we had a picnic, and he made sure everyone had a plate. He puts my shoes away when I ask him, and he brings me a blanket when I'm lying down in the living room with my tits out and I ask him to bring me a blanket.
What's important is recognizing where they are developmentally and helping them grow. When possible, natural consequences are the best. Threatening (or worse) to destroy a kid's social life over bedwetting is merely fucking with the kid's head. The natural consequence of wetting the bed is helping your parents change the bedding and getting the laundry started before going back to sleep. The natural consequence of not telling your parents that you wet the bed and trying to sleep in your own pee is getting cold because the water starts evaporating, so now you're too cold to sleep, and you eventually get up and tell your parents after all, because changing the bedding when you are tired isn't fun, but it's better than not being able to sleep at all. I speak from experience here. When you learn a lesson like that, you don't forget it.
You're going to get a dead kid that way.