Haha i knew someone would ask. Its called "hybrid vigour", google it
Crossbred animals from any species usually have healthier genetics than purebreds. Its because purebreds are basically
inbred and so they only have genetics from a very small gene pool.
A snake breeder who breeds purebreds does this for one reason, to produce a breed which "breeds true" and conforms to a "breed standard", These animals come from a "good bloodline" - that is one that is inbred so it has as many of characteristics that the breeder regards as desirable. Sadly with snakes its mostly all about looks, not neccesarily health.
Unfortunately this search for perfection and uniformity comes at a cost- The health of the animal. I cant explain this without typing a whole page so ill give an example.
Dogs for example, Its well known that a "mutt" or crossbred dog will probably be more hardy then a purebred . Purebred dogs die earlier and devolop far more tumours and cancers then mutts and are often less intelligent. Golden retrievers have bad hip problems and beagles have epilepsy, all this is a result of inbreeding the dog to keep the "purebred bloodline". Crossbreds are the basis of all farm animals because well they are basically superior to purebreds...
If you want me to i could go into detail about the genetics of purebreds and crossbreds and why crossbreds are healthier , im learning this stuff at uni so i like talking about it anyway lol