My understanding is that yes, it can sometimes be dependent on biology, but the really interesting part is that it's also highly dependent on circumstance and your work environment. ADHD & procrastination is a good example: the behavior of people with ADHD is not uncommonly described as "lazy" because ADHD delays the brain's development of executive function capability. Well as the article points out, for decades procrastination has been shown to be a problem of executive function, so if your ADHD brain isn't fully capable of executive function you're practically guaranteed to fail at executive function in the same way that causes procrastination. The behavior is almost identical: you're continually putting off the required task.

But not all procrastination is caused by a literal brain disorder. Your neurotypical brain can be capable of executive function but still fail at it. The article points out some reasons why:

> When a person fails to begin a project that they care about, it’s typically due to either a) anxiety about their attempts not being “good enough” or b) confusion about what the first steps of the task are. Not laziness. In fact, procrastination is more likely when the task is meaningful and the individual cares about doing it well.

You don't need to be biologically impaired to be confused about what the first steps are. You don't need to be biologically prone to anxiety to be anxious. More importantly, you can change your surrounding environment/circumstance to change these factors and therefore change this particular behavior.

ADHD is actually really interesting because its executive dysfunction can be so effectively compensated by the environment. The same environmental aids that might compensate for the executive function failure of a neurotypical procrastinator can also compensate in someone with ADHD to the extent that they perform at the same level as their neurotypical peers.

Subjectively, I think that's a really surprising and clever finding. This high circumstantiality isn't necessarily true for all psychological traits. Research suggests that homosexuality in males, for example, is not so easily changed or predicted by circumstantial changes. It's also not clear that you can compensate for the dysfunction of Aspergers/Autism and its resultant behavior.

(feel free to correct my science, I admit I'm not so well versed in it!)

This all can be broken down all the way to "do we have free will at all". Maybe literally everything is predetermined and is purely a response to the inputs.

And then does it even matter what the answer to that question is? Is it useful to think "Well they are just biologically lazy" instead of trying to find ways to motivate people to be less lazy.

There are genetic disorders that can severely affect executive function but that isn’t “lazy”. It just appears to be.

That's because eugenics is absolute nonsense and has been debunked time and again.