I basically came to the same conclusion about the S&P500 a few weeks ago.
I watched a normie financial advisor tell the audience savings accounts only pay 1%, but he can get 12% in mutual funds. I noticed that was about what the Chapwood Index says inflation is in the closest city to me.
Therefore, all the gains of index funds are an illusion. People are really just treading water in a pool, but they think they're surfing a 12 foot wave.
Don't forget 20% cap gains tax. Those are losing numbers once you add that variable.