Imagine smearing shit all over your ass and feeling clean. If human shit fell on your floor, would you wipe it a few times with dry paper and say "good enough" or bring out a disinfectant spray?
Neither dry paper nor a stream of warm water is going to clean human shit off. If you aren't using soap and some sort of scrubbing action, it still smells like shit.
Now now... It pisses on your ass, splatters your ballsack, and THEN you smear WET shit all around just like every toilet paper peasant you look down on.
And I have a bidet... but I don't strongly prefer it.
Every bidet I've ever used is like this. They're just as dirty as dry wiping, just in a different way. Like, sure; with a bidet you end up with a cleaner ass after wiping yourself dry, but you can get the same result with a wet wipe but with less collateral spray damage to your cheeks and legs (and balls if you're a dude).