I think in these intellectual bubbles, people wildly overestimate how much the average person has any interest or knowledge in the kind of breadth things like H

I think in these intellectual bubbles, people wildly overestimate how much the average person has any interest or knowledge in the kind of breadth things like HN and OvercomingBias offer. Polymaths are highly over-represented here. There are 18m people in Greater Los Angeles. How many are involved in anything close to the variety of topics HN and OvercomingBias ponder?