I completely agree. When keeping more than 5 snakes, it's practical space wise to have racks with tubs. But when you only have 1-3, those tubs just sit alone without the insulation of the rack and surrounding tubs and, IMO, look ugly.

Also, and PLEASE don't be mad at me for this it's just what I see, unless you are a big time breeder getting a good income from your collection, these animals are companions. And, since most people wish to view their companion (even if it's only for an hour late at night) without pulling out a drawer-like tub, they set up tanks or display cages.
True, tanks require a bit more effort to get going and stay where they should... but they do work! It just takes patience and a bit of innovation. And, in the end, that effort is worth it when you have a happy snake in an attractive environment.