look at them, how happy they are, don't don't have to look for a job, don't have to talk TOEFL or GRE to waste their life, don't have to get a PhD , no dang stuff like prestige etc...

but they have to hunt for food , have to find an opposite sex to mate , have to nuture their young, have to avoid predation....

life are basically all alike, it's only that theirs are simpler, complex life is supposed brings us better life, but usually it doesn't