Yep! I'm perfectly happy with my body, and was before I started cycling.
Like a few others on here, I ride because it helps me with mental health, and because it's a replacement addiction for other far worse things that I could be addicted to.
Even if I were perfectly sane and didn't have addictive tendencies, I'd still ride because it's just flippin' fun! I might ride slower or do shorter distances, though. But seriously, exploring hidden urban areas where cars might not go...rambling around in the countryside taking in the scenery...screaming down a hill at 45MPH on a 16 pound piece of plastic...what could be better than all that?