I dunno.
I suppose some would call me a cleanliness fanatic; for me, there's no odor better, more refreshing, than that of bleach or ammonia or hydrogen peroxide (not mixed together, of course) permeating the house.
And a constantly-mopped kitchen floor, so that the cats, on their way to the litter-boxes near the back porch, don't pick up germs and filth. Unlike the primitives, and even though I'm not a cat person, cats are a responsibility, and one wishes them to enjoy long and healthy lives.
I suppose it has something to do with having grown up around, and in, hospitals.
I am of course fully aware that dirt and filth can have useful purposes, such as strengthening the immune system and keeping one from evolving into a sissy.
But the deal is, out here in the Sandhills of Nebraska, dirt is ubiquitous, and one gets dirt whether one wishes to or not. Not to mention that life is more sweatingly arduous here, than in the big blue cities. So the cats and I get at least our quota, if not more, of the beneficial qualities of dirt.
It's always nice to have at least a small temporary haven from dirt.