Dude, Skill is a derivative of knowledge... They go hand in hand. You acquire knowledge of your prey and hone you skill from that knowledge to become a better hunter/fisherman. Did Native Americans just send young hunters out to the forest without first teaching them how to hunt or fish? It's all luck anyway, right? Go get 'em tiger. No, that would be absurd. They were taught strategy, and important info to help them be successful.
Skill is something physical, knowledge is something mental. They don't go hand and hand. For instance, you could know everything there is to know about guns by reading every book out there - then when it comes down to it, you couldn't hit a target five feet in front of you when it came to shooting.
Native Americans hunted with sticks and hand made bows. That does take skill. Hunting with primitive weapons is definitely hard but it was also necessary for them to survive. And for fishing, they couldn't just get a Rapala and some line and go down to the lake. Completely different scenario.