A couple months ago I got my first rack system and switched all my snakes from glass tanks to the rack. Only one out of the five snakes I had would ever use his entire enclosure (It was one of those zilla 40g wide tanks). All the other ones would stay in their hides. However, my lesser that seemed to ... I suppose "enjoy" his enclosure did have the most natural set up out of all of them. He had two javawood hides & a crap ton of artificial plants along with peat & Sphagnum moss & a stone water bowl. (I was a little nuts over him because he started it all lol) I used to feel that way to. That rack systems were cruel. But It was getting difficult to maintain humidity and the right heat for all of them & for most of them the space was excessive. So I caved and got the rack & I love it. All of them go through perfect sheds every time & the heat and humidity are extremly stable. They seem comfortable, & Harry (my first) still gets his enrichment by getting to go outside in the summer or hang out downstairs with me lol.
So idk to me it the racks are a win win for both owner and snake because it does increase ease of cleaning & care and for the snake it creates stability & security.
But if you have a snake like my Harry then a medium sized showcase cage with crazy amounts of foliage & hides for them to feel secure like they would in the rack would be cool to; for my other snakes it would just be a waste of money.