Nine teaspoons of sugar doesn't seem like "a lot" to me, at least spread out over the course of an entire day. According to some dietitians at least, that nine teaspoons should be my limit. When I'm eating over 3000 calories per day, that's less than 5% of my caloric intake.
I've already changed what I eat quite a bit from what I used to eat, and I know my diet is a lot healthier now, despite the fact that I can (at least if I treat all of the sugar listed on a nutrition label as if it belonged in that special category "added sugar" -- a dubious assumption for tallying what still seems like a dubious categorization) get most of the way to the supposed nine teaspoon (38 gram) limit just by eating a 600-calorie breakfast consisting of yogurt, a protein bar, and one cup of whole grain cereal with less than half a cup of skim milk.
Doing more cooking from scratch? Hah! Given that I hardly ever even assemble a sandwich at home these days, let alone cook or bake much of anything, I'm definitely a long, long, long way away from making my own Greek yogurt. I never was much of one for cooking or other food prep before, and now that exercise takes up 1.5-2 hours a day (even more sometimes) six days a week, I've got even less time for food prep.
You can, of course, simply get plain yogurt and add your own fruit to it. My wife does that. But besides being a lazy bastard in the kitchen, I love the huge variety of flavors pre-flavored yogurt comes in. There's no way I'd ever have a wide array of different fruits ready to go without having most of it spoil before it got mixed into my yogurt.