Yogurt is full of sugar.
You CAN buy "real" yogurt, you know?
Those have little to do with plain yogurt, as it comes out from the traditional process and as we know it in Europe.
Plain yogurt has very little sugar and only naturally occurring at that:
The greek yogurt in my fridge has about 10% fat (7% saturated), and 6% carbohydrate (4.9% sugars). That sound close enough to natural proportions for me to believe it was not heavily processed.
This one had the fat removed (but that's an easy process, and doesn't alter chemically the base product or add any substance to the ingredients).
That said, the whole process to create this (even the fat-less version) is the basic, standard yogurt creation process known since the dawn on civilization, and not some mix of flavors, sweeteners and food processing that characterizes modern "yogurts".
Ok, so basically, for all intents and purposes, 'yogurt is full of sugar.'
Thus, 'yes'.
"No they don't, only 99% of people have two eyes."
"Yeah, so basically, people have two eyes."
"No, those people with two eyes aren't 'people.'"
It's the actual definition and quality of something that matters, not the popularity of a mis-representation of it. Statistics do not define substance.
Even if 99% of milk sold was chocolate milk, that wouldn't mean that milk contains cocoa. Milk is a specific thing, yogurt is another.
You're only confused in the case of yogurt, because whereas "chocolate milk" is sold with a different name than that of milk (that makes the different obvious), sweetened flavored yogurt is sold as "yogurt".
And the side of "yoghurt is a specific thing, and products based on yoghurt don't get to redefine what it is, even if they are sold under as members of the "yoghurt" category, the same way that chocolate milk being sold in the "milk" section does not get to redefine milk as having cocoa".
You really want to make the argument that these american programming offices have access to homemade yogurt? I really am skeptical this is an option when even fresh vegetables are not normally available.
It's like you're asking why don't they eat partridge, peacock or grouse meat in order to avoid the hormones in commercial chicken from the grocery store. Kind of an absurd argument. Why don't we restrict the discussion to what is actually going on rather than some unrealistic fantasies?
Plain unsweetened yogurt is not something exotic, it's easily available in supermarkets...right next to all the sweetened yogurts.
Fage's Greek yogurt has 16 grams of saturated fat in a 7 oz package.
Compare to Dannon yogurt which has 5 grams of saturated fat in an 8 ounce serving.
Is Greek yogurt really better then?
Disregarding your specific mention of saturated fat, grams of fat produce more calories than grams of sugar, so the Fage has 190 and the Dannon has 160. At that point (100+ yogurt cups to make a 1lb difference), it really comes down to the individual deciding/recognizing their body's own reaction to each macro-nutrients and fitting the right version in to their diet.