Physical switches rely on light as a handshaking method. When the light is off, the switch is invisible and you have to guess at where it is, or where you need

Physical switches rely on light as a handshaking method. When the light is off, the switch is invisible and you have to guess at where it is, or where you need to be walking (hitting your shins on things, or stepping on lego) Using a non-light based interface means it works just as well when the light is on and off, vs being a broken experience for half of the usecases