I thought some recessive morphs were discovered by accident by breeders who just happened to pair up 2 snakes that carried the genes?
That's not that surprising. The same thing, in reverse, happened in the tulip mania in Europe several hundred years ago. The most prized tulips were ones that displayed a weird stripey color pattern. It was later discovered that the color pattern was caused by a virus! Some people still raise these virus-infected tulips (it is recommended you keep them far away from other tulips), but there are also flowers that genetically have similar patterns commercially available (no virus required!).