I always look at the ingredients list of bread in the US and I am always surprised how long the list is. Why do they put so much stuff (and always sugar or syrup) into any bread?
Some of it, because they are required to, by law. Some of it, because they are allowed to, by law. Usually, whenever you see sugar added where it is not necessary, it's because fat or salt was removed from the recipe, to "improve" the numbers on the nutrition panel. And then you have to add the fat and salt back in yourself later, with butter or mayo or something. You can't reliably and conveniently get "good" bread…
Or live near a Trader Joe's or Whole Foods. They're not that unusual.