I don't find it comparable at all. Rack systems are designed to keep the snakes at the correct temperature and humidity, and for ease of cleaning so the snake doesn't get an RI, scale rot, burned, etc. Most snakes also prefer to be in their tubs; many of mine dive under their hides when the tub is opened. They like it in there and do not want to come out.

Compare that to a dog from a puppy mill which is often riddled with parasites, has parvo or kennel cough, is underweight, filthy, has fleas, etc.