I think it would be uncomfortable if the foot had balls.
I mean, balls are hard enough to deal with where they occur naturally.
I mean, balls just hang there under a guy’s ‘thing’ and their bio-location can be problematic. Think bicycle seat. Ouch…
So if the foot had balls, well, shoes would need a drastic redesign. An engineering retro-fit. You know, cause if the shoe don’t fit you can’t wear it…
If the foot had balls, well, athlete’s foot would take on an entirely new dynamic.
Gladiatorial games and Empire.
It’s all about the money.