A) Maybe you're in a jurisdiction where it actually does mean something? That exception is clearly defined in the sentence you quoted. B) The claim is not that

A) Maybe you're in a jurisdiction where it actually does mean something? That exception is clearly defined in the sentence you quoted. B) The claim is not that nutritionists are useless, it's that (in most jurisdictions) the word is useless. The fact that you know a non-useless one does not disprove the claim.