That's the thing with these things. They live and occupy their space and everyone else just says "Why aren't there any X?" because X exists but because it's not so big, no one knows it does.
For the most part, these communities are better because those who would idly ask "Why doesn't X exist?" don't know that X exists. Essentially, there are two requirements to joining the club:
- You should be able to find the door
- You should know why the door is hidden
If you're just like "I want what's on the other side of the door" but you can't meet these two conditions, then you can't have it.