We need smart electric appliances from Apple at home - lights, washer/dryer, refrigerator, etc.,. We'll be controlled by Apple wherever we go :) Apple eyewear could even track how many times we flip our eyelids.
The point is that they don’t need to. They are not selling advertising, they are selling privacy as a service. E.g. Apple maps breaks apart your journey on their side so they can’t reconstruct your journey from a to b.
No no no, stop it, it's Apple and this word is the synonym to "privacy", you are not buying a device, it's like second mother, caring about you and protecting your privacy with angel wings.