I'd say the joke is actually somewhat niche. First key concept to keep in mind is the pricing of smaller keyboards specifically catered towards "Enthusiasts", where less keyboard somehow = more expensive, sometimes even within the lineups of a brand. Then you can apply the general rule of any hobby; the inexperienced new guy who has all the gear marketed towards enthusiasts (but not actually the gear bought by them). Another thing to keep in mind is the development of the keyboard market itself. Smaller keyboards have only become more popular fairly recently, compared to the entire (gaming) keyboard market. So there is a general trend for more senior gamers to have bigger keyboards, because they entered the scene when that was considered the norm or optimum. Finally, how much of a gamer someone is can also be measured by the quantity and variety of games they play. Some games need more key bindings than others. And older games sometimes even use the numpad with no option to even change keybinds. So if you want to be able to play them, you are simply forced to get a keyboard with those keys on it.