I think you're assuming more from Apple's privacy statement than they say. "We don’t build a profile based on your email content or web browsing habits to sell

I think you're assuming more from Apple's privacy statement than they say. "We don’t build a profile based on your email content or web browsing habits to sell to advertisers." How do you get from a phrase like that to "... if I delete an email, its metadata is gone too (indexing, antivirus, etc.).?" In particular, the antivirus and indexing data---particularly any manual signal you provided to Apple on whether you thought that email was spam---is likely retained to improve the quality of their service for you and other customers. They said they're not building a profile on you to sell to advertisers. It'd be really surprising if they aren't building a profile on you to improve things like, say, Siri's understanding of your interests, or Maps' understanding of your area, etc. So is the third-party advertising where we draw the line?