I've heard the car insurance analogies which don't work very well. Perhaps a life insurance analogy would work better... Now everyone can apply and get life ins

I've heard the car insurance analogies which don't work very well. Perhaps a life insurance analogy would work better... Now everyone can apply and get life insurance regardless of preexisting/current conditions. To make it affordable the young and healthy will pay more than the statistical probabilities that they will die tomorrow. The elder will pay less. How is this sustainable except through ever drastically increasing premiums?