I am personally a rabid descriptivist, but I still find myself somehow sympathetic to this editor's cause. Much like "literally", losing the "official" meaning of "comprise" would leave us (i.e. English speakers) without a word which uniquely captures that meaning.
People will use words however however they will, and that's their absolute right. And without pretending that the aforementioned unique quality should (or even could) justify enforcing one meaning over the other in the English language at large, I think that it's fine to have different standards for different contexts, and that Wikipedia is a context whose need for precision and clarity justifies some pedantry.
If this guy's willing to put in the legwork, more power to him.
People will use words however however they will, and that's their absolute right. And without pretending that the aforementioned unique quality should (or even could) justify enforcing one meaning over the other in the English language at large, I think that it's fine to have different standards for different contexts, and that Wikipedia is a context whose need for precision and clarity justifies some pedantry.
If this guy's willing to put in the legwork, more power to him.