There are approx. 4000 religions out there today. Most of them have a rule saying “our religion is the right one, believe in the wrong one and terrible things happen to you after you die”. If one of those is right and 3999 of them are wrong, what are the odds of anybody picking the right one? Most believers don’t even put in the effort and learn all about the other 3999 to be sure that the one they picked is likely to be correct. They’re just gambling with a tiny chance of avoiding “hell”.