In North America with no draft animals larger than a dog why have a wheel.
In South America with no draft animal larger than a llama coupled with the Andean terrain again why have a wheel.
Though the concept was there. There were Aztec, Mayan & I believe Incan children's toys with wheels.
I have read that, too.
However, that means that humans were the draft animals for roughly 200,000 years.
No one figured out that one worker could transport ten times as much wood or stone, or migrate all his tools and household goods to a new territory, with a pulled wagon?
That sounds really strange.
They obviously could have used horses. Indians wistfully looked over the plains atop their horses, until the white man came and ruined it all. At least that is what Sedona tourist art leads me to believe.