I totally agree. It is completely nonsense to say. In other languages it is different. I just know some Spanish, but they don’t have a word for berries or nuts, it is all just fruit. (Forrest fruit for berries or dried fruit for nuts) but they don’t call potatoes vegetables, but “tuberculo”. Interesting difference, which i guess is because they have another climate and other plants.

We do just call it a vegetable in my language.