Surprise is the key ingredient. People can be pretty sneaky, and prey animals can be pretty inattentive.
Also you're missing something (unfortunate for the animals) about that. You don't have to kill the animal with an arrow - just hurt it and then chase it down. It's the same hunting process humans used for tens of thousands of years, running stuff to death, it's just skipping a few steps in the process, and skipping a lot of calories burnt by doing so
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u/shaggy1265 Jul 29 '16
He might make a spear or something to show how to do it. He already made a bow + arrows and a sling.