Can confirm some cats get used with bathing. I've witnessed at a beach (at the seaside/2 Mai/Black Sea) a cat that was following its master into the sea, and swim around without even being called to get into the water.
It was the craziest cat I've ever seen, almost like a dog. Still with tons of cat personality, but able to take a few commands from its master. Also, it was a very territorial cat, no one could've come close to the owner's tent without being attacked by that cat, not even dogs.