For me winning isn`t surprising at all
The path to added muscle is consuming more calories than the amount needed to keep your current bodyweight unchanged.
All else being equal, the guy with the best genetics will have the best physique. But rarely are all things equal.
I started training bodybuilding in 1983.
Back in the 80s we were very cautious about steroids.
If I listened to my instincts, I'd be down at the pub chasing women, not under a 400 pound bar squatting