I could beat down hill and I suck... Honestly no pro really has shirt genetics. They might have shitty ascetics but not genetics.
Um, aesthetics is part of genetics, Mr. Engineer.
"Size, shape, proportion, conditioning, symmetry, and balance: combine all of these into one human body and you get amazing aesthetics. Forty years ago, guys like Serge Nubret, Frank Zane, Sergio Oliva, and Arnold Schwarzenegger were the kings of aesthetics. They built strong, powerful bodies that looked incredible from every angle. They all had a tiny waist, an insane V-taper, and slabs of quads that made their knees look tiny. These guys were so great that their legacy is just as inspiring and powerful today as it was in the '70s."
You can't change the shape or proportion of your your muscle and most people can't even change the symmetry of their body. One side of the body will always be bigger than the other. I mean, you can reduce the imbalance, but its still largely genetic.
IF you have a blocky waist by nature, you can't train for a tiny waist (sure you can make it smaller with good dieting, etc, but look at Cutler--blocky for life), nor can you really make up for a poor v-taper if you have an extremely narrow frame. It doesn't mean we are destined solely by our genetics, however aesthetics is still strongly tied to genetics.
