Most of the problems really just comes down to needing friends to play with it seems. Doing Deep Dungeons or Maps with randoms just isn't that much of a thing.

It sucks but I feel like FCs and other groups that host group content have this weird monopoly on it. You can either run a lot of content solo at a very inconvenient pace, or you can find randoms on PF which may also take a while or you can bend your schedule around a specific group's and try to make yourself as useful as possible to them in order to be able to do that content efficiently.

And from what I know of, this is a MMO issue. Literally any other game like FPS you can just queue up with random players. I mean you can do that with most dungeons/bosses, but every other piece of content isn't so convenient.