I meant - explain how would that data retrieval actually happen in real life for a domestic abuser.

Abuser calls police and says the victim did some crime, police subpoena Google for location history.

How is that different from getting that data from the phone company?

It isn't?

The end result is the same, the abuser gets the location of their victim. More routes for the abuse to get that is worse than fewer ways for them to get it.