Expecting one site's landing page to encompass everything for everyone is ridiculous and something a lot of user-generated content sites fail at understanding.

Expecting one site's landing page to encompass everything for everyone is ridiculous and something a lot of user-generated content sites fail at understanding. You need to filter it to the extent that there's enough for everyone to at least recognize that there's content somewhere there for them, but not overwhelm them. Between being generically named, being linked in similar subreddit sidebars and showing up in the search, I think it's pretty easy to find what you're looking for or create it yourself and know that it will get more bites than a random website people would have to Google to get to. I would even say that in Reddit's case, there are just so many users from so many different walks of life that it is an easy bet to find a subreddit that suits your fancy in both content and personality. There's an exploratory phase that anyone who wants to delve into a community has to go through, and if that takes too much time, perhaps that's the user's problem, not the site's.