Honestly, as an Epidemiologist, you should view hand washing less as "I got pee on my hands" and far more "You have to pee regularly, and bathroom implies water

Honestly, as an Epidemiologist, you should view hand washing less as "I got pee on my hands" and far more "You have to pee regularly, and bathroom implies water, which implies the ability to wash your hands. You should probably wash your hands." You should also wash your hands before eating. And after laundry. And all manner of other things. It's just a particularly convenient prompt.