I think the comment you are replying to is implying that it's a bit funny/weird that the wipers turn on, because there aren't any sensors that are looking out t

I think the comment you are replying to is implying that it's a bit funny/weird that the wipers turn on, because there aren't any sensors that are looking out the window to see. (As others pointed out, it could just be default auto-wiper functionality, and of course passengers still like being able to see out the window, even if they aren't controlling the vehicle).