Earlier quoted context omitted.
Does your auto insurance pay for your defensive driving courses? Your homeowner's policy pay for additional smoke detectors? Your life insurance policy pay for a treadmill? What would those policies cost if they did?
To some extent, they do in the form of a premium rebate, though it is unlikely to be large enough to be a substantial reimbursement for a single policy period - perhaps over the life of the policy the cumulative rebate might cover the up-front cost. I haven't worked in casualty, only health, so I can only speculate. The better comparison would be with Worker's Compensation insurance, where the loss control mechanisms…
Employers pay those costs themselves in return for rate reductions. Not sure how that differs from any of my other comparisons (auto, life, homeowner's).
I think you have to admit that one's health care premiums have nothing to do with that individual's "actuarial" risk to the insurance company. There is not a single form of insurance that follows that pattern. NONE.