You're entirely correct that most people just aren't all that fun or weird. Over the last 20 years the internet has become an increasingly commercial and democratised place. In the earlier years the level of technical aptitude necessary to be a content producer online would have filtered out the contributions of all but the more tech-savvy amongst us, who I'd wager tend to be among the more 'fun or weird' people out there. For commercial reasons alone, it's advantageous to all parties involved from those on the infrastructure side, all the way to media companies and manufacturers of consumer goods to make the internet a more accessible place. This has contributed to the internet becoming ever more homogenised, commercial and bland to match the taste of the vast consumer public. 2019 internet is built for the same status quo that the television stations and tabloids of old were made for. Also refer to the 'Eternal September' phenomena on Usenet, that's pretty much what's happened here at a large scale.