What kind of insurance do you think these obese people would have qualified for in the United States?
Not being a fat stoat I don’t know from firsthand experience, but I haven’t heard much in the media here in the USA about people being denied insurance exclusively because of their weight, although I did link to a FR thread about discussions in Missouri to do just that with Medicaid patients.
They'd immediately go on welfare here, and go to the head of the line ahead of the taxpayers getting stuck with their bills. If you've ever been in the hospital with a welfareite, it's a real eye opener. They know exactly how to work the system and demand to be treated first, with the BEST doctors, and the best treatment regardless of what it costs. They get loud and obnoxious and get what they want just to shut them up. With our welfare system, we've created a monster.
They might have trouble getting individual coverage. If they got a job which provided insurance, I believe it's still rare though becoming more common for individuals to be refused or their employers charged higher premiums for specific risks.
IMHO, you can't sell insurance, which is intended to pool risk, and then refuse anybody with a risk. Then you've failed to provide value, because everyone you're willing to insure loses money by being insured and would be better off paying out of pocket.