> before we invented sharp sticks we killed things by just running behind them until they died of exhaustion, then carrying the corpse back home.

Sharpening sticks for food almost certainly predated bipedalism for our ancestors, as chimps have the behavior, and bipedalism is what makes us World’s #1 Exhaustion Hunter

Bipedalism made us able to both throw sharpened sticks and run more efficiently, so you can’t even say exhaustion hunting predated spear hunting, they most likely evolved in tandem