They periodically send the location of nearby cell-towers and wifi hotspots (all public information) back to a crowdsourced database. _Your_ identity isn't associated with any of it. Apple doesn't know who you are or where your phone is. They do not store GPS coordinates. A single cell tower is nowhere near accurate enough to determine the location of the phone, etc etc.
Google/Android do this too: https://qz.com/1131515/google-collects-android-users-locatio...
You can also entirely disable location services if you're uncomfortable with this and that'd stop it.
You're weaponizing people's ignorance and the complexity of the technical details.