> They have sugar in them or chemicals.
Nitpick: everything is a chemical (even water itself).
Nitpick: everything is a chemical (even water itself).
If you take a look at the dictionary, which is a documentation of the practical use of words, you will see that to talk of chemicals in food is entirely coherent. Words do not have absolute definitions, they are defined by their usage in the real language.
https://www.collinsdictionary.com/dictionary/english/chemica....
The purpose of language is communication. If the 'practical' use of the word doesn't communicate anything, then the practical use is wrong.