yes, but this still does not classify their laziness as a desease, does it?

Maybe you should read the article again, or the previous articles on definitions and question-dissolving, because you seem to have missed the part where "is it a disease?" isn't a real question.

"Disease" is just a node in your classification graph - it doesn't have any real existence in the outside world. It's a bit like an entry in a compression algorithm's lookup table. It might contain an entry for 'Th' when compressing text, because a capital T is often followed by a lower-case 'h'. But this doesn't mean anything - it's just an artifact of the compression process.

And so is the idea of a "disease".

Well, I won't much sympathize with them, but I would offer them a medical treatment, if it existed and they asked for it.