Yes, this is how I feel about it as well, but apparently it's a norm. Individuals will have their own unshared bidet towel in the bathroom that they'll use afterwards.
Agreed, you don't just throw the towel up on the rack and call it a day. Usually you throw it in the wash or wash it out with soap when you are done. But at least your bum is a lot cleaner than smearing poop all around it with TP.