As I have said before when I come in from doing extreme trail running I'm dirty and sweaty. I can just hop in the shower and my watch is also cleaned.
Hmm. Still don't understand. When I get home from a long run and hop in the shower I definitely want all sweaty materials off me ASAP, including my watch squeezing my now blood engorged wrist and my chest strap.
And your watch might get cleaned but the skin beneath your watch won't, at least well. When I take a shower cleaning me takes priority.
Watch does have an advertised waterproof rating of IPx7, so Apple will never deny any warranty claim of water damage.