"Kids procrastinate or shut down because they fail to see the relevance of a task, prefer other distractions, or struggle with comprehension, organization or motivation. And nagging isn’t going to work."
It's called immaturity and lack of experience.  That's what parents are there for, to give them the experience that the kids lack.  And sometimes natural consequences are a good thing.  It reinforces to them that they should listen and pay attention to what the parents say.  I can tell them the stove is hot and it will hurt if they touch it, but sometimes they have to experience it for themselves.