That's not true. The rule calls for changing the headline when it is misleading or linkbait. "Think you drink a lot? This chart will tell you" is arguably bait because it uses the "you" trick and the "this" trick.
Seems a little misleading, as the population of drinkers is only 70% of the actual population.
We certainly don't claim to apply the rule correctly all the time. We are, however, happy to be corrected. The best way to complain about a title on HN is to suggest a better one.