Earlier quoted context omitted.
1. Make a prediction about bubble 2. Get it wrong 3. Excuse yourself by claiming market is irrational
That is the quote of famous financial advisor made in 1986. It keeps being repeated, because bubbles and their pops and irrational markets are frequent enough. There is nothing controversial about claim that markets are irrational, bubbles pop impossible to predict while bubble being visible. Previous bubbles were the same.
Zitron's claims are wrong even if the AI bubble ultimately pops. Being directionally right about stuff like this is worse than useless and makes people overcredulous of the other side.