[stillsut]

This is actually confirmed with real world data on this for professional football with player weight and professional basketball with player height.

For Offensive Linemen in the NFL, there is no correlation between weight (which range from 300-360 pounds) and overall performance. A "heavy" 350 pound player is not more likely to do better than a "light" 310 player. But nobody who weighs a mere 250 pounds could realistically make the cut or perform well at the highest level.

For basketball players there is no correlation between height and performance, and there are several standouts examples of players below six feet so there's no cutoff. But if you compare the distribution of the subpopulation versus the general population, you'll see an extremely strong height bias.