Why do they have to be superhuman? Simply being human is enough. If we set our minds to killing something, we are going to find a way to do it, that’s the human spirit.
Can we kill it with an arrow? Nope. How about a spear? Nope. Hey, let’s scare it with fire until it runs in that box canyon, then Ugg and Nodar can push boulders off the cliff onto its head!
You of all people should know better than to underestimate what ancient humans were capable of dreaming up, man!
The megafauna were not hunted to extinction over centuries, period.
The extinction was sudden.
The suddenness of their extinction was one reason someone dreamed up the super-hunter model, which is otherwise based on nothing.
The other reason to push the super-hunter model is as a prop for the Clovis-First-and-Only model, which requires that the very first humans to arrive in the Americas expanded from Alaska to Tierro del Fuego in no time flat.
At the time of the extinction event, the human population was miniscule and not distributed across the entire continent.
And there was plenty of other food to eat, game much easier to obtain.
All it takes is for people to just think it through to realize how foolish and simpleminded the super-hunter model is.
And that doesn’t even take into account the fact that the Clovis-point making culture went extinct at the same time.