Apple has their own ads and personalization is enabled by default. Why not make it opt-in?

> They sell their own products to you and that’s all they care about.

You can also extend this to say that they want you to only buy their devices/services. If you have an iPhone then non-Apple smart watches are missing basic functionality such as replying to text messages. Force everyone to use Safari and limit it's functionality to force apps onto the App Store (30% cut!).