The author misunderstands basic human behavior here. And there are enough literal-minded people on HN that everyone ought to just avoid this advice entirely.

Just one example-- some narcissists will take the author's strategy personally, and they will fuck with him relentlessly for their own amusement. Worse, it won't be clear to onlookers who is the victim and who is the aggressor. It will appear as one low-empathy individual trying to "train" others while another, intransigent individual actively resists the training. There's even a good chance onlookers will see the narcissist as the good guy, successfully fighting back against the author's snobbery and condescension. If you can't think of a citation for this pattern then you don't currently live in the U.S.

And that's ignoring the fact that inconsistencies in other people's reactions over time often don't have anything to do with the author's behavior. Someone who comes away from interactions "feeling small" may in fact be consumed with their own crippling anxiety. Interpreting that as a failure of the author's Pavlovian strategy is a recipe for codependency that helps no one. The whole metaphor is a fool's errand.