Consequentialists often point out that whether things like laziness are moral failings or are physiological problems with no moral bearing, it still makes sense to treat them as a moral failing, because it’s usually more likely to result in incentives and social pressures that lead to the moral failing/physiological problem being fixed, mitigated, or worked around.

There was an SSC article that had some good discussion on this at some point, but thanks to NYT I can no longer link it.