Well, I've been helping out with reptile rescue for over 10 years and I can tell you that I've seen plenty of expensive animals of many different species and morphs that come in in rough shape. Yes, you do see more normal ball pythons, or normal boas or normal corn snakes, but that's because they're ARE more of them. I used to see a lot more Green Iguanas or Normal Burms coming in, but those species have declined, not because they're suddenly easier to take care of, but because they're just not as popular as they used to be so they are fewer in number.
I think that there is a HUGE trap that ANYONE who does animal rescue of any kind has a danger of falling into. In any kind of a rescue situation you do tend to see animals that are in very rough shape and are on deaths doorstep. seeing this kind of thing can break your heart and make you feel very uncharitable against your fellow man. Unfortunatly I think that this is where an awful lot of animal rights activists come from. However, people who see this dark side of pet keeping are not seeing the whole picture. For any animal that comes in with problems from mistreatment, there are hundreds of others out there that are in great shape and are well loved and well taken care of.