I don't need friends to group with constantly. I need a consistent way to SOMETIMES find a group within 24 hours. You're focusing on this friend aspect too much.
I can get a guild to run a lot of content with, but since we're all leveling, the content will be spread out until we max.
So, since we're spread out and no one on the server wishes to group in a a reasonable/unreasonable time frame, it becomes a problem.