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Urine isn’t sterile. While it’s true that paper towels are better than dryers, drying your hands (even with a dryer) is better than not drying. Washing your hands is, obviously, better than not washing your hands.
If you don’t wash your hands you’re already in the worst case. It makes no sense to complain about the methods of drying available.
I’m not sure I follow your logic here. You believe you’ll come into contact with other people’s piss and shit less often when people don’t wash their hands?