Government knows far too much about what happens
Location information can be very sensitive. If you drive your car around the United States, it can reveal if you go to a therapist, attend an Alcoholics Anonymous meeting, if you go to church or if you don’t go to church. And when that information about you is combined with the same information about everyone else, the government can gain a detailed portrait of how private citizens interact.
This information used to be private. Thanks to modern technology, the government knows far too much about what happens behind closed doors. And local police departments make decisions about who they think you are based on this information.