In addition to our ability to throw shit, humans also have some of the best endurance that mammals have to offer. An example of this is the Human V Horse race in Wales. The race is a 22-mile / 35-kilometer marathon that takes place in mountainous terrain. Normally, a horse would beat a human in a race without a problem. But in a marathon, humans actually stand a chance with an occasional victor in this specific annual race. All due to our exceptional endurance.
Put the projectiles and endurance together, and we make for a terrifying hunter. Imagine you're some other animal out in the wild. Maybe you're really fast or really strong. But if a determined human really wants to try and kill you, there's no out-running it. It'll catch up eventually. And if you choose to fight the human, they'll get the first blow.