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> insurance is to protect yourself from an unknown randomly distributed loss

But when randomly distributed loss hits you'll surely expect to be subsidized by others who somehow weren't affected by this despite their aggressive driving, or bad diet, etc.

> bad diet, lack of excercise, and bad genes

Now imagine the fun times when your insurer decides which one they can use to screw you over and how badly.

Sure, I get your point but it's buried in a mountain of nuance that makes the "straight forward logic" meaningless. The insurance industry doesn't need yet more ways to screw people over, or give the people who need it most an even bigger middle finger and hang them out to dry.