Not surprised. This is insurance. You don't get car insurance after you've gotten in a wreck, and you should expect to pay more for it if you're more likely to get in a wreck (e.g. lots of speeding tickets, etc).
That's not quite accurate. Depending on how one measures somewhere between 40% and 70% of health care costs are used to treat lifestyle diseases (too much stress, too much food, not enough exercise) like high blood pressure, heart disease, diabetes, tobacco, alcohol, avoidable accidents, etc. Those problems are not genetic. They're behavioral.
Of course one can suffer these things without having the risk factors. I presume the experts who calculated those numbers corrected for that.
So in about half the cases (half the cost to be precise), sickness really is your fault.
One of the reasons high deductible plans have such low premiums despite not screwing people over with small print is that they attract a more healthy segment of the population, because a high deductible creates some incentive to avoid those [preventable] diseases.
As it is, people are only hit on their regular expensive plans if they smoke. Imagine if they were also hit with higher premiums if they were overweight (BMI>25, 2/3s of Americans are overweight), drank too much, smoked too much, didn't engage in regular physical activity, etc. Then the premiums for those who have a lifestyle which wasn't likely to cause chronic diseases would only pay half of what they're currently paying. Those who engage in risky lifestyles would see their premiums increase by 50%.
