Do you think prehistoric humans ever tired of their career choices? Do you think a gatherer in hunter-gather society ever said, "I hate digging up roots and collecting firewood . I just can't take another day of digging. My nails are a horrible mess and my back is killing me. I'm throwing myself off this cliff."
Or a hunter ever thought "I am so tired of running after great bison. Everyday it's chase the great bison and then haul big pieces
of great bison back to the tribe. I'm too exhausted to run anymore and my feet are killing me. I can't take another day of this. I'm going to sit down right here and let a dire wolf bite my head off. "