It has nothing to do with who is right or wrong, it has to do with what is right. If you want to throw your money away with higher octane gas because it makes you feel better go for it. Whatever gives you a warm fuzzy feeling go for it.
Bottom line is that lower octane gas is easier to ignite. In an engine with lower compression (like a Wrangler) it does no good to run higher octane gas. It gets tiring watching the dumb masses getting a cold air intake, throttle body spacer, k&n filter and running 93 octane who swear they feel a difference with their butt dyno.