Its a bike, wash it. Nothing wrong with a pressure washer, nothing wrong with a plastic brush on your chain and you bike will still work fine even if its wet. I have been washing the same bike for 15 years now and there is still no rust, paint is fine and I have used the same DID X-chain for the last 10+ years.
Just be smart. Softer soaps for fairings, stronger soaps when needed for rims and engine degreaser only for heavy buildup. Soft sponge for cleaning delicate parts and a plastic brush is fine for chain and engine degreasing. If you degrease or ride in heavy rain then re-grease. Drying is up to you. The only advantage I have seen for hand drying is to minimize spots form water droplets.