Then the problem wouldn’t be cheese. The problem would be the additives that may or may not be added to specific American foods & household products. The problem could also be the different pharmaceutical products that are used here, the current obesity crisis in America, or anything else.
Check out this article about global opioid use (HERE). The US consumes far more opioid products per person than the rest of the world, with only Germany being close (and the US still consumes 50% more opioids per person than Germany). How do we know this isn’t a major cause of whatever complications the OP is talking about?
And check out this article about the global obesity rate in 2017 (HERE). It claims that roughly one third of all Americans are obese (109,342,839 people) with puts us as the country with the most obese people by far. To put that in perspective, the #2 and #3 ranked countries each have more than 3 times as many people as the US (China and India).
The OP even mentions obesity’s rise in the US, yet jumps to the conclusion that it must be because of cheese? If obesity were the cause, why couldn’t the cause be our 900 calorie cuts of steak, 1,000 calorie fast food meals, or 1,000 calorie Dunkin’ Donuts Frozen Mocha Coffee Coolattas? Why cheese but nothing else?