In my opinion, I dont really feel that normals are any more healthy than morphs. The morphs are just a varience in aesthetics. Yes the spider gene is linked to the neurological problem. I dont want to judge, but I dont think I would get spider just because of the possible problem. It doesn't effect the health of the snake as far as we know. Its kind of like springer range in American Springer Spaniels. Breeders in America bred the freckles out of the dogs and as a result the dogs went crazy. The sweetest dog would turn into a monster and not hesitate to bite anyone. I have an English Springer and I wouldnt get an American. I dont feel its fair to take the risk of breeding the freckles out just because people like the freckleless appearance. In this case it effects the health of the individual to the point where they must be euthanized. I dont believe this to be moral.
But I really dont think morphs are any healthier than morphs. Bob Clark has one of the largest retics, I think it might actually be the largest captive retic, and the retic is a morph, a tiger.