That’s what the flavor experts at the company do, and you end up with 22g of sugar per serving
Till you meet Bethel yogurts. They have a much more "reasonable" amount of "added sugar" (IIRC ~12/13%).
Also, you don't get all those junky additives the other brands' contain.
Take for example their maple syrup flavor; IIRC its 2 ingredients are
-100% whole milk (IINM all the other companies use skim milk, and then add back cream depending on the % milk-fat content displayed on their label),
-100% pure organic maple syrup.
And the general texture of their yogurts are something else! Good stuff!
I find their plain yogurt much more palatable than the other brands.
But as others mentioned, the major hindrance is indeed their high price.