I was explaining this to my daughter in quite simplified terms the other day- we evolved to taste sugar and enjoy it because finding a sweet edible plant meant we had a source of energy to help us hunt that day. Pretty useful if you’re a hunter-gatherer.
So we seek out sugar. Now we can get it whenever we want it, in much more massive quantities than we are supposed to be processing. Most of us are addicted. I’m not an exception.
It doesn’t ultimately matter, but it looks like total sugar. I don’t believe fage has added sugar, but it has some left from the milk.
But it does matter a great deal. The sugars innately in most fruits usually have a low glycemic index, so generally aren’t really that bad for you.
So presenting granulated sugar to represent the innate sugars in a tomato is misleading.
Fruits healthfulness is commonly exaggerated. Consuming the fiber in whole fruit along with the sugar is better than just straight sugar, but it’s still something that should be moderated. Most fruits have way more sugar than fiber as well. Also that really only applies to whole uncooked fruit, using heat and mashing up fruit removes pretty much any of the benefit from the fiber.