There's been a nuclear war and the world is a post-apocalyptic nightmare. Would you rather be killed instantly or be one of the survivors?
This post-nuclear world isn't a flower farm where everyone pulls together and makes a new life. But you could survive, possibly with luck and a lot of sacrifice. The odds are against you, though. Only a very few survive, and those who don't die instantly will die painfully (with like two heads, or possibly none). It might be a miserable existence, but it's an existence.
Note: Surviving the nuclear war does not ensure a long and full life. The Day After taught us that.