BTW, there's no out of pocket cost for preventive care for those with insurance in the US. There hasn't been since the Affordable Care Act became effective.
By contrast your odds of a catastrophic collision have more to do with drivers and driving collisions than they do with whether you got an oil change recently. If they were insuring your cost of major repairs and buying a new car, then they would have an incentive to get involved with routine maintenance as well.
Alas, those checkups and screenings still cost the same, regardless of who is paying for them. So when you decouple payment from benefit, you create adverse incentives.
I think the two practical problems with this view are (a) what's routine to you might be catastrophic (or at least seriously detrimental) to someone else, and (b) missing routine care often leads to catastrophic outcomes.
Whether a cost is insurable is not subjective. The gp observed that insurance only works to manage risk. Insurance against a risk of 100% certainty costs more than managing the risk itself. Insurance that covers doctor’s visits takes a certain expense and runs it through a system designed for uncertain expenses, thereby adding essentially parasitic loss.
> missing routine care often leads to catastrophic outcomes.
As a sibling comment observed, this is already something that insurance companies deal with. Failure to obtain regular and preventative care makes one more likely to need intervention, which means the cost of insuring the patient is more. Therefore people who are actually paying for catastrophic insurance can save money by going to checkups. This would decrease costs, rather than cause them to baloon like insuring high probability events.
So it's not entirely out of the question that they could give discounts for properly maintaining your vehicle, if that were a major cause of accidents and it could be tracked.
It's a healthcare regulations being used as corporate welfare problem.
You’re using a very narrow definition of insurance that doesn’t cover health insurance in the US.