Norman Doors.
Good design communicates even without language. It is reasonable to see a toggle switch and think it... you know... toggles. The same reason you see a handle on a door a pill before you read the sign that says push. The sign is literally there because the physical design is telling you something different. It is literally mixed signals.
Apple could have done many different things to make the design clearer. Hell, if they really wanted to keep the toggle like design, make it look like a spring.
But no matter what, the current design is abhorrent because they use the same design language for a temporary toggle and a real toggle. It doesn't take a genius to figure out why people get confused. It is also crazy considering how much Apple prides themselves on design. If it was good design, you wouldn't need the sign...