It makes my skin crawl to say this*, but the answer for most people on HN is probably "yes, they are."
* both because people in tech are prone to Paul Graham style 'nerd martyr' arrogance, and because I often read views that disappoint me here and I do not like to admit that an intelligent person can hold them
By a mathematical necessity, half the people can say “Yes, most people are stupider than me." without lying.
Journalists have spilt a lot of ink recently about arrogance in the tech community. They point out tech figures who mistakenly think their aptitude in one knowledge domain means they know better than experts in other domains.
That's one reason.