As kids, we're told only people who go to college/university for politics/economics/law are qualifiable to make/run a country. As adults, we see no nation these "qualified" adults form actually work as a nation, with all manifesto-driven governments failing. Which to me validates the ambitions of all political theorist amateurs, especially as there are higher hopes now that anything an amateur might throw at the wall can stick. Here's my favorite from a friend.
Very good point, it might lead to more tribalism if kept too small
exactly, though some small degree of tribalism is wanted (e.g. a community of tech-heads, or a community of hippies, or a community of furries, etc.)