If um, what's his face, Chris had been more attached to his family it probably would have been harder to leave them and therefore would have
taken a few more precautions to his journey and tried a little harder to survive.
But seeing as he hated his parents and their guts, he just sort of left and died without a care of their misery.
yes..he had the option of being selfish...people who value their families often don't feel this way