Modern cars are computers on wheels - they have more sensors than you can count and are constantly phoning home with telemetry data like your location, speed, fuel levels, sudden accelerations/decelerations, video footage, driver attention data from eye monitoring systems, and hundreds of other data points. Cars have inward- and outward-facing cameras. They have microphones. They have always-on modems. It’s all enabled by default with difficult or meaningless opt-outs, and your data is monetized through brokers like LexisNexis or Verisk.
The part about the car using your Bluetooth to utilize your phone’s signal to dump all its data is annoying. I can see in the near future they will just wire these components so they can’t be disabled, or by disabling them you void your warranty.
Without legislation we are at the mercy of corporations.