if you lived in a society that valued, i dunno, tracking and hunting down giraffes in small groups, would you have the same struggles? what if just participating in society required ~20 hours of athletic activity a week? i'm not entirely convinced you would have this problem, based on the anthropology i've read.
the signal of a maladaptive culture is not 'i feel like the people around me have a moral failing'. It is 'i, and many others, feel like we've all got basically the same moral failing.'
personally, this has been a very helpful reframing. If I simply can't bring myself to do something, that means not that I am bad and my willpower is bad, it just means that something is materially wrong and I should consider addressing it by doing things that my body will let me do.