>Maybe you should be asking the opposite question like why should evolution reward sedentary life?
If you can live a sedentary lifestyle and still produce children, then evolution doesn't care. In fact, an indoors lifestyle is much more fit in the longterm than a life of hard labor.
Evolution isn't trying to create the Platonic Ideal of a human. It just is a thoughtless mechanism to efficiently reproduce DNA.
> If you can live a sedentary lifestyle and still produce children, then evolution doesn't care.
Hunter/gatherer humanity did not have the luxury of a sedentary lifestyle, so it did have a negative impact on your ability to produce children for a long time.
> In fact, an indoors lifestyle is much more fit in the longterm than a life of hard labor.
I think "hard labor" is a bit extreme, but even so, working a physically demanding job is still better for your overall health than a sedentary lifestyle of office job + sitting on the couch watching Netflix.
If you can live a sedentary lifestyle and still produce children, then evolution doesn't care. In fact, an indoors lifestyle is much more fit in the longterm than a life of hard labor.
Evolution isn't trying to create the Platonic Ideal of a human. It just is a thoughtless mechanism to efficiently reproduce DNA.