I am not a short king but I am a straight cis Asian guy, and this at least somewhat true and I did not know it until I did serious work on myself and actually pinpointed the behaviors of mine that were clearly my insecurity and desperation to be liked seeping out (speaking in generalities to myself and others, name-dropping stuff I thought would make me cool, reacting by matching my tone and enthusiasm to that of the person speaking to me rather than giving a more organic response that's less of a departure from what I felt deep down.)

A lot of these short guys, like Asian incels, bond over insecure feelings and observations they independently arrived at due to them being the first level thoughts of any guy who's unlucky romantically due to having a stereotypically negative trait. They believe these feelings and observations are them getting a peek at an unlocked well of truth, rather than equally resigned quitters validating one another's ideas borne out of self loathing and the need to have a mentally placative answer for indecipherable and unpredictable social dynamics.

Just like how, when an Asian incels sees an Asian guy being confident with girls they auto-assume that guy was adopted by whites/had Americanized parents/is gay, then tell each other that as if it's a shared universal rule, bitter short guys will see some short guy who dates women taller and hotter than him and tell each other that the guy must be rich/famous/large penised/ex military.

These kinds of online social groups/subreddits are literally anti-achievement and self-growth. The more their shared lore is outspun to try to comprehensively and objectively catalog the hard and fast rules of a nebulous and volatile reality, the more detached from normalcy they become and the further they are away from having dating success or even natural human interactions.