That’s exactly the problem.
People get coverage only when they’re in trouble.
I mean people usually put their money elsewhere, which is completely understandable.
No one ever thinks they’ll get so ill, they’ll die.
Sure they do. It's called life insurance. You buy on a bet that you won't need it, but your survivors might. Medical insurance is purchased against the prospect of an unexpected accident or illness. You pay based on current health and likelyhood of incurring an incident that will require payment. If you're already sick, there is no longer a probability of a payout. It is a certainty. That's a bet nobody will accept. What you should buy is a maintenance plan similar to a motor vehicle. Plan on paying for regular services. A pool of insulin dependent diabetics could arrange an ongoing stream of purchases from suppliers that allow for a volume discount based on an assured pool of customers It's easier to produce with an assured customer base and assured payment stream. Bursty demand and payment is too chaotic for a manufacturer to support with a high volume, low price sales strategy.