I just turn off all the toggles for personalized suggestions from Siri and targeted advertising and don't worry about it? I don't receive anything targeted to me as far as I've seen.

I believe the toggles are fairly visible under Settings > Siri, and then I'd probably search for Privacy and Advertising and do toggles there too.

To be fair, I rarely have location services turned on either. Mostly just cause I enjoy looking at the maps more than I enjoy getting directions as opposed to a big concern about being tracked. I find I learn the areas I'm in better that way.