There's a difference between what THE game is about, and what MY game is about.
Look at the PHB (any edition) - the lion's share is about how to damage things, or how to resist or recover from or prevent damage. The stats, class abilities, spells, weapons and armor - it is largely about fighting. So, the game is about combat.
My game, however, can be different. How much effort my players and I spend on combat is different than how much effort the game as written spends on combat.
Folks reject the idea that the game is about combat as if it were some kind of indictment. It isn't. Most RPGs are largely about the fights. There are reasons for that, and there's nothing in that fact that's wrong, or that needs to be fended off or defended against.