I am not getting into a debate here, but there are numerous scientific papers that discount the outdated mythology you are repeating. You have Google, look stuff up. Recent stuff.
I have 5 snakes, they all use all their space. They all love to climb up a branch and hang out. I feed a varied diet (mice, rats, quail & chicken,) and don’t have a picky eater in the bunch, even the one that a breeder slipped up saying he was a “picky mouser.” They all eat f/t, I converted the ones that came home eating live.
I will say, most issues can be fixed with a proper enclosure. An animal kept in a minimalist environment is more likely to be neurotic and dysfunctional. I did notice, the snakes I received very young (a month old,) are the most curious and engaged. The snakes that spent some time in a rack are more fearful and slower to learn and adapt. I did slowly upgrade a former rack snake slowly on size, because he’s nervous and a little overwhelmed, but even he adapted and now spends time rearranging the enclosure and gets agitated if you move anything. Lol.
You can speculate and judge, but I’m only speaking honestly from my own experience. I love my snakes and love watching them act out their natural behaviors. I love watching them curious, engaged and learning. I’m interested in things like reptile enrichment and training.