Fruits contain a lot of fruit sugar. If you're trying to avoid sugar entirely, they may not be the best choice.
Vegetable contain a lot of sugar too, like the mention he ate a lot of carrots, he ate a lot of sugar, but that's naturally occurring sugar human body can process well, unlike tablespoon of sugar in a sausage made of processed meat.
https://www.npr.org/sections/thesalt/2011/09/26/140753048/ki...