Second, this was more incoherent babble than useful. While I am an investing nerd, this article could be about 1/3rd as long. The rest was trash writing and ego.
Third, there is some worthwhile content in that 1/3rd that's good. But it's nothing groundbreaking or new, and detached from the EMH topic. His perspective on Warren Buffet was worthwhile, though, and the idea that once a tactic goes public the collective abosrbes it and the edge is lost is worth pondering over, and the comparison of using a stone-age axe against a fighter jet is meaningful too. There's no real discussion around the lifetime of tools, techniques, and perspectives. That might be the most worthwhile takeaway for me.
Forthly, equating market action to coin tossing is intellectual laziness. I would agree with this on an intraday trading level, but in long term investing that's just not the behavior equities exhibit.
Lastly, my portfolio has beat the S&P500 by significant margin (>3-8x) for 5 years. I'm still waiting to get humbled so i can investing in the S&P500/bonds and call it a day. If history is any indicator, it should be an eventuality. But given the perspective that stone-age axes don't work against fighter jets, I wonder how that could come to pass.