Even if you're not super concerned about privacy there's a big difference between google periodically polling for your location at the moment to target ads (information it does not sell to others), and your insurance company tracking your every drive (and likely every movement even when not driving since location is on at all times), real time speed, stop, turn and braking events in order to charge you less (or more) based on your driving. This data is such a huge attraction for hackers but also the government. Once this information is saved it can be used at anytime. In 20 years if we go the direction we have been going, why wouldn't the government just ask all the insurance companies for all of their back records, and why wouldn't insurance companies start pooling their information together to create a record of you?
Our legal system was not conceived during a time when there could be perfect monitoring of every person every second of the day, and laws were not expected to have perfect compliance by every human every second of every day. If we were all monitored 24/7 every single person in the US could be charged with a crime; whether it be jay walking, rolling a stop sign, speeding, whatever. That's a scary future that people seem to be ready and willing to head towards for a few bucks off their car insurance policy.