Do people don't have a problem? People in the stone age simply hunted monsters and mated through their whole life to prolong their race. Does that mean they did not have problems and lead a simple life? No, each and every single entity has to face an ordeal every single day.
One may assume and think of it as a simple task while the other person sees it as a big wall. Primitive man ages ago had face major threat in their every single day, unlike modern men. They had to train their body to reach the pinnacle of their performance which was needed in order to survive.
Bur, the modern men were drugged by technology and driven to addiction. This led to the loss of ruthlessness in men. Men who once hunted monsters became slaves to their jobs just to gain money in order to get a living and comfort.