Wonder what's that thing at 1:40 ;) "at turn, wipers suddenly full tilt for no apparent reason, person gives input to the right paddle" - yes, I know that contr

Wonder what's that thing at 1:40 ;) "at turn, wipers suddenly full tilt for no apparent reason, person gives input to the right paddle" - yes, I know that control normally sends CAN messages for wiper operation in all modern cars, and that it wouldn't make sense to release a video with overt manipulation of the system; I have been conditioned to look for side channels though, and this is technically a human giving a driving-related input. But seriously, what does the car need the wipers for? All the sensors are outside anyway, no?