But saying there's no more significant difference between D&D and Backgammon than between Backgammon and Monopoly is false. All it would take is the realization that D&D is a refereed game to realize your statement won't hold water.
So D&D is different from backgammon simply because it offers different gameplay, but Backgammon and Monopoly are the same?
Sorry, but as I said D&D is not special and you, by extension, are not special. The sooner you come to grips with this, the sooner you can begin living a rewarding and meaningful life.