Also, if your pet is a python, there's a decent chance you semi-regularly purchase rats or mice to feed the python... whereas a person who keeps rodents as pets probably develops an attachment to them and would be horrified by this.
In my experience, people who keep rats, mice, ferrets, guinea pigs as pets... they rarely keep their cages clean enough to prevent them from smelling horrible.
It is possible to do this, and apparently its not that hard, just in my personal experience i have never met someone who can pull this off.
It depends in part on male vs female; male rats and mice mark territory (and sometimes even their favorite walking paths, so beware if you let them roam) with urine. Back when I kept rats and mice, the female cages would always smell better than the male cages, no matter what I did.
Now I keep pythons, and both male and female cages don’t stink lol. I have to admit that the smell is the biggest thing I don’t miss about having pet rodents.