> The feeling of wetness is something that you get used to once you realize that your butt clean.

I'm not talking about wetness. I'm talking about feces. As in sitting there getting blasted with a sprayer for well over a minute trying to hit all the angles and then seeing brown on the paper being used to dry up. Just spraying water does not work on its own. If you wipe normally first, then a bidet afterward will probably get you cleaner. But if you don't wipe first then there's no guarantee that it will do better on its own than wiping would have.