Earlier quoted context omitted.
True. People often incorrectly believe that less and fewer have distinct cases where only one word is correct. They are mistaken.
(The aside was for you - TFA's title is not a case where either word works.)
> But for more than 200 years almost every usage writer and English teacher has declared such use to be wrong. The received rule seems to have originated with the critic Robert Baker, who expressed it not as a law but as a matter of personal preference. Somewhere along the way—it's not clear how—his preference was generalized and elevated to an absolute, inviolable rule. . . . A definitive rule covering all possibilities is maybe impossible. If you're a native speaker your best bet is to be guided by your ear, choosing the word that sounds more natural in a particular context. If you're not a native speaker, the simple rule is a good place to start, but be sure to consider the exceptions to it as well.