Hi,
It's probably related to the fact that how their breakfast was killed by other people has no chance of getting them charged with animal abuse and all their animals removed.
Maybe you have a totally different system over there but over here the animal welfare organizations care a great deal more about mammals than they do about reptiles.
They also don't have the training in most cases to be able to truly identify mistreatment of reptiles outside of the most extreme examples - but they know putting a mammal in a sack and swinging it against a wall is illegal and will prosecute happily and get you banned from keeping any animals at all for years as a result.
A problem avoided is far better than one you have to deal with later.
dr del