Why do people keep venomous snakes as pets?

Recently, in a town near me, a woman was found dead in her home. It is suspected that she was bitten by her pet black mamba snake, which is one of the deadliest snakes in the world. She was 56, her live-in boyfriend was 46, and they had 75 snakes in the house, 56 were venomous. The black mamba snake was found out of it’s cage, which is why they suspect that’s how she died (pending autopsy results). I just read today that not every time a venomous snake bites does it secrete venom, and they (“they” being the local authorities that investigated) think that the woman may not have called 911 because she was hoping the snake did not secrete venom, and because if she called 911 she risked the snakes being found out and confiscated.

If someone keeps even one venomous snake as a pet, and the snake gets loose, the whole household is at risk of death, or major health problems such as neurological impairment. This seems like gambling, and we all know that when people gamble, they often lose.

This makes me ask this question: Why do people keep venomous snakes as pets when the stakes are so high?