Only for his game and some other people's.
You do understand
it was his game he was talking about.
He wasn't speculating on your game.
That being said however D&D is not chess.
It is not cerebral and existentialist, though it does not preclude those things from time to time.
Or preclude anything else for that matter.
But it is, essentially,
about heroism.
And heroism is not words, or rhetoric, or argument, or debate.
That's for the forensic class and the doctoral thesis.
Heroism is about deeds. Good deeds, selfless deeds, dangerous deeds, deeds in service to another. Imaginary deeds in context, granted, it is after all only a game, not real life.
But then again it was not designed as a game to inspire crunch, fluff, mathematical calculation, or ephemeral bouts of indecision and personal angst. Those things are merely tools and means to an end. They are devices,
not to be confused with a real purpose.
The game was designed so that players role play heroes and heroines, not philosophers and pedagogues. Champions, not chatterers. And maybe even by role playing heroism to learn something about what that might be like in real life. One never knows til he tries.
If in time it became that other thing, that speculative game of the all things are equal under the sun, and what's really important is how fast you level up, rather than what you accomplish along the way, well, that certainly wasn't the fault of Gygax. That came much later.
But Gygax was speaking about his game.
I reckon he understood his own purpose okay.
And I do agree with him on that one, and that is a fact.