Protocol could easily have been designed without the Google backend roundtrip
Google will know every time you get in your car and where that car is located building a database of your most frequently visited places (stores, friends, gas stations, work location, home location). This will be attached to your google id, your email address and your phone number. Google will know if you have to drive to a hospital, if you are having an affair, how old your car is, when you attend a funeral, a concert, a movie or a sports event.
Licensed further and integrated in smart home devices and computer login; then virtually all your activities are now known to Google.
Ease of use is the opioid addiction that Google is peddling. Once your hooked, you can't give it up and you just keep giving Google all your private data and don't even care.
This protocol could have easily been developed without the need for Google to gain access to this private data.