The idea of four guys going into the woods and spearing a deer is a myth, a false parallel to modern sport hunting. Beaters pushed the prey towards kill zones. Fires could be set to get game moving. Fences would be biult to funnel game. And everyone was involved in processing the kill. Sure, maybe the big guys threw the spears but that was actually a small part of the process. The safest kill would always have been that where the animal injured itself first, no big guy muscles required. So there were plenty of jobs for all abilities.