Well I suppose you are correct in that the hulls don't care, but since I have the bucket of suds and hose out, I wash the entire boat, the hulls usually have a lot of road grime on them from trailering, but I want the salt off the mast, beams, blocks, lines, and I lay the sails, harness, life jacket, gloves, booties, etc. out on the lawn and wash the salt off them too. I hang the spinnaker from a tree and spray it down to get the salt off it too.

OK, call me anal...but I like a clean boat.