I think this is because they try to protect their families from the world of pain and suffering they see every day.
" The devil replied, "Each time one of your friends messes up on earth, their clock speeds up one hour." The firefighter thought for a moment and then said, "I don't see the Chief's clock anywhere? A firefighter came home from work one day and told his wife, "You know, we have a wonderful system at the fire station: Bell 1 rings and we all put on our jackets, Bell 2 rings and we all slide down the pole, Bell 3 rings and we're on the fire truck ready to go. The captain and the chief asked him, "How did you get that? Finally they came across an old shack where they went inside to play a game of poker. Three firefighters went out on a hunting trip one day. The weather was miserable and they hadn't seen any deer all day.According to an internal investigation and a wrongful death lawsuit, Moree left a burning building with Bell still inside, assuming Bell had gotten out on his own.This investigation led to 19 recommendations for the department.