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.
Laziness is a symptom, not a cause. It's like diagnosing someone with a "cough". It may be correct, but it's pointless, because it's obvious and tells you absolutely nothing about what to do.
That being said, our ailments could probably be categorized by affecting all aspects of our life equally and in full measure of time (i.e something that doesn't fluctuate across the years is probably an untreated ailment).
A sufficiently self-managing nutter is indistinguishable from a genius.
This is also a perfect description of depression.