if that were true it’d still just be the average and not the individual. individual variation has always proven to be wider than geographic or race assigned traits.
bones are super soft when you’re a kid, and some are still fusing into the teens. meanwhile, western cultures are using high chairs for babies and a lot of eastern cultures use tables where everyone sits low to the ground
so everything from the very beginning is shaping our structure. ( easiest way to verify would just be first and second generation surveys i guess 
)
