It's absolutely not feasible to think that health insurance should be comprehensively risk-priced the way that auto insurance is.
For one, owning and driving a car is a choice, while having a body is not. Sure, in some areas you "need" to have a car - but realistically people survive without cars all over the place. I know of no one who has survived without a body.
There are some aspects of their health over which people have control, and others over which they don't. Separating those out is incredibly difficult. Person A and Person B might both have the same mediocre cholesterol score, but Person A eats right to compensate for a genetic predisposition to high cholesterol, and Person B doesn't eat well but has good genes. The same is true for obesity, high blood pressure, etc.
And people have individual situations which make these formulaic calculations difficult to apply in a fair way. If someone doesn't exercise much because they have terrible chronic knee and back pain - you're going to penalize them for that the same way you would for someone who just doesn't feel like it? I certainly wouldn't feel good about doing that to someone who's already struggling.
It's easy to talk about this kind of thing in the abstract, but once you get to the real-world implications these lines of reasoning fall apart very quickly.