Exercise, for example, is bullshit make-work that only some subset of people are wired to enjoy for some reason (never worked out how, I'm gonna guess they're either wired to receive reward signal for this, or it's social activity; half of life's motivation is low-key sexual drive anyway). I don't. So I have to find whatever proxy that works for me.
100 years ago this wouldn't be an issue, because I'd naturally get fit, because daily life required substantial amount of physical labor that we've since automated away.