I have come to wonder if lazy actually exists as a thing in it's own right. I too had the 'smart but lazy' label, was diagnosed with ADHD past the age of 50.

One of the things I noticed was when people talk about "Sometimes you just have to knuckle down and do the thing you don't want to do". That was an ability that just came and went with me, the same task one day would be "Right I had better do that thing now" and I could do it, another day, even the idea of it seemed impossible. The fluctuations were clear enough to show that it wasn't a moral failing, or just me doing the things I wanted to do. The same thing in the same situation was just so radically different. I can see how people who have only experienced the easy side could fail to understand the difficulty, I don't think night and day would do it justice.

ADHD is quite highly correlated with depression, one of the main hypotheses of why is because people with ADHD have grown up being told that the thing that is intrinsically them is a bad thing to be. A hypothesis of why not everyone with a genetic predisposition for depression becomes depressed is because there might be a form of feedback loop that makes things that make you feel bad make you feel more bad. Being critical of ADHD behaviour is an easy on-ramp to that feedback loop.