I know what you are saying. Better call the dealer to really clarify. I also dealt with BMW Toronto (last year) but I decline their wheel/tire protection as I deem not necessary. I have never dented/bented my wheels or even replaced the RF for the last two bmws I have.
If you lease the car, then maybe good idea to get the protection because you know BMW may be very picky when you return the car.
Lastly, my interpretation is still they are referring to BMW wheels since all other wheels (aftermarket) are not approved.