Alas, you're looking at a tree and not the forest, my friend. The average investor doesn't have the ability to analyze and pick cheap stocks and you know it, Lester.
(The Baruch quote is a different quote, by the way.)
But you're absolutely right that markets can stay overvalued for a long time. In this case, coming on a decade, with perhaps several more due to money-printing.
The goal isn't to get out at the top and make a fortune off the future poverty of others. It's to change the game.
When the water goes out, your last two paragraphs will prove to have not aged well. ;)