This will be a quick and simple post. Imagine being a short man before the Napoleon Complex was coined (and accepted by society like some official mental condition). You would, for example, be able to lift weights to your heart's content without people claiming you're compensating, or calling you "hobbit" or "oompa loompa" (more modern ideas used to insult short men). Automatically, your quality of life as a short man would be slightly better.
Whenever someone claims society has nothing to do with heightism, and it's "instinct" to hate short men, that is objectively false. Ideas like "short man syndrome" or "tall dark and handsome" weren't craved into stone by nature. These phrases are repeated over and over again, so much so that it seems like we are born just knowing these things. Couldn't be further from the truth.