The world is a cruel place. The better you have it, the more the random setbacks, tragedies, and outrages stand out without any good explanation.
People need something to look forward to, a better tomorrow. Eventually the godless materialists realize that life is a downward spiral that can only end in pain, humiliation, and death.
You need faith that defies the stark, cold realities of life.
Kinda like ///Life sucks n then U die // a song