Earlier quoted context omitted.
I don't think it's that deep: Obligatory manual labor destroys the body (and, often, the mind) and what time you have you spend exhausted. Being entirely sedentary remains a choice for us office workers—this is why people exercise and spend time outside. Of course, I would like more flexibility in choosing how much I and where I do my sedentary labor, so I might devote time to, say, gardening. But it's easy to forget…
It truly is not a choice, as I cannot sustain my family / lifestyle with manual labor. Opting into working out for the sake of my health is not nearly the same.
Success and failure are choices. Accepting this allows us to take responsibility for the worlds we've created. Ignoring this is self-destructive act of cognitive dissonance and we pay for it years later.