The mechanism is ordinary and hard to see from inside. A reporter with real access writes that a subject is fond of saying something. Readers reasonably treat that as testimony. The line then gets quotation marks, then a speaker tag, then an occasion — each retelling adding a little specificity that the original never contained.
Quote Investigator captures that hardening in progress: a July 2013 tweet by Om Malik placing the remark “in conversation with another CEO,” a September 2013 listicle ranking it among the smartest things Bezos ever said, and an August 2014 Financial Times piece situating it in meetings with suppliers. None of those supply the missing thing — a documented moment when Bezos said it.
This is not a debunking. Nothing here suggests Bezos did not say it, and a man who built a company on the principle may well have phrased it exactly this way many times. The honest position is narrower than the internet’s: widely credited, strategically authentic, source unlocated.