I’ve got a pretty severe sensitivity to – of all things – sugar. (I know, “sugar” isn’t very precise, but I’m pretty sure it’s either glucose, fructose, or sucrose.) I virtually never eat anything with added sugar or anything with any significant amount of natural sugar. And I’ve eaten that way for like 20 years now. I’m practically blind to half the produce department (any “sweet” fruits like apples, pears, cherries, grapes, oranges, etc) at the grocery store, let alone the candy isle.
I don’t know that I’ve ever thought of something as inedible. But, I will say that, when I stop eating sugar for awhile, it is crazy tasting going back to it.
Going through these phases has helped me to understand what people mean when they say American food is too sweet, especially things like sandwich bread which I never thought of as sweet before.
It also makes sense about desserts that are “sickeningly sweet” - I’ve always had a sweet tooth (have one now) so I never thought of it that way. But whenever I go back to these desserts it becomes pretty obvious what people mean.