“Cats don’t need to be groomed.”
That’s fake cat news.
When cats lived outdoors, their shedding fur was blown or pulled off by wind, branches, dirt and sand. Rain and snow washed their fur. Sun dried the oil on their skin. They ate less food, so didn’t get “messy bottoms”.
Cats only moved inside recently, after the popularization of cat litter. Cat litter was invented in 1947!!!
Nature used to help cats get rid of shedding fur and dirt. Now we need to help them.
(And yes, some short-haired cats do fine without being groomed, but as they age they need help.)