Sidetrack, maybe a silly question: Under what circumstances are you touching your dishwasher with wet fingers? Plates are dry when they go in and dry when they come out if you have a decent dishwasher.
Capacitive buttons suck, but they are no worse in dishwashers than in any other appliance, in my usage at least
I like to rinse the plates off to remove larger food debris prior to putting them into the dishwasher. It’s not always necessary though.