In retrospect it is kind of amazing how EGG’s writing could be so verbose while also being so thoroughly opaque, leaving important game design goals in near obscurity. Ironic that Gygax’s favorite class, the fighter, may have suffered the most from having so many of its class features (e.g. magic swords, disrupting mage spells, etc) left unstated.
Contrast with the Draw Steel rulebook which apparently says something like, “Here is what you can do with this game. We drew inspiration from games A, B, and C. If you would rather do X, Y, or Z, you might want to just play those games instead.”