Indeed. All I see from this and similar threads here and articles all over the internet on topics like these is:

"blah blah hindsight bias blah blah rationalization blah blah"

At the end of the day, the only useful theories for the stock market are the ones that have predictive power. I'd be interested in reading articles by people who are consistently willing to put their money where their mouths are and consistently make money on their theories' predictions, but anyone who can do that of course tend to know better and tend to keep their mouths shut.