Wikipedia can be great, but it's not the undisputed authority on all things. In fact, I'd sooner trust the
Encyclopedia of Arda than Wikipedia on Tolkien. The writer(s) of the bit you quoted probably arrive at the correct conclusion, but the fact is that, in the book, that conclusion is obvious. "A lot of hassle would have been saved," however, if certain people did not stubbornly worship certain anti-heroes in willful denial of the facts. The question deserved little to no serious response, and I indulged in debate only because of Jackson's misrepresentation of Gandalf/W-K and the fact that so many seem to have swallowed it whole.