And maybe, that's already happened. :]
Natural selection plays a big part in this.. as humans we find two genes that we want and we're able to breed those. Whats the real chance of those genes actually meeting the wild? Lets say theres a wild Albino.. what are the chances of it meeting another Albino? Slim to none, so if it breeds it's probably going to breed to a normal creating hets. What are the chances of those hets surviving and meeting other hets or albinos? A bit higher because the albino parent is still around as well as the brothers and sisters, but thats still an isolated area, where albino animals don't blend too well so they would obviously not have a very good chance of survival.
Most eggs layed by ball pythons in the wild too don't make it, are eaten, or the hatchlings die.