This is true, but it doesn't address Fifth Element's point. RC asserted that the set of possible games that are improved by DM fudging is "empty," i.e. that no such game exists, regardless of whether RC is playing in it.
Or so close to empty that it makes little practical difference whether there is an empty set or a set in which .00000000001% of games fall.
I do believe that there are GMs who believe that thier fudging helps their game; that is quite a large set. The GMs who are right about this is a vanishingly small set.
It may be that any given GM's game is improved by judicious use of fudging as one of the many tools available to the DM in running the game, but, as the man said, "extraordinary claims require extraordinary proof".
Now, the above is, of course, only IMHO and IME. YMMV, as they say. You can decide that the size of the "GMs who successfully fudge" set is extraordinarily large, if you like. Nobody's stopping you.
You can say that GM's who don't fudge harm their games and make them worse. Nobody's stopping you. (And, if you did make that statement, you would not be saying that those who said otherwise were "lying untrustworthy liars", but rather that you believed that they were mistaken in thier belief.)
If a game has mechanics that allow the GM or players to fudge without attempting to deceive the other party, said fudging causes no problem IMHO. But, the minute you (and not your NPCs or PCs) are trying to deceive the other party
as to how you are using the game rules, there is, IMHO a problem.
You might view it as being a problem either way; that those who do not do it are causing a problem. The DMing advice from 2e onward (and, as has been pointed out, a line of Gygax advice as well) has certainly pushed in this direction.
It is my opinion that anyone is a position of special authority has a greater obligation to be honest about how that authority is used. The GM is in a position of special authority. Using that authority to deceive damages the mandate which gives that authority.
IMHO, YMMV, etc.
For what it's worth, I also think that cops who break the law do more harm than ordinary citizens who do the same, and that this damages trust in
all cops -- even those who have never done so much as jaywalked or taken a paper clip from work.
Likewise politicians, doctors, etc.
RC