Earlier quoted context omitted.
"Lazy" is also what kids with ADHD are labelled. I think "lazy" is a cop-out explanation, since it doesn't actually explain anything. Often the incentives are aligned so that it's in the kid's best interest to put some effort into homework. If they're not doing it, treat it like a debugging program: why aren't they responding to the incentives? Could be depression, ADHD, perfectionism/fear of failure, or a bunch of o…
Trust me, laziness is a real thing; even when everything in the world points towards doing the work being the best thing for you, you just can't be bothered.
This is also a perfect description of depression.