It's common sense that a pre made party will always be better than a DF random party, and some content requires a premade (most post 50 content is not Random party friendly or can't even be done in DF).
But sometimes, people want to just get off work and not spend 6 hours they could be playing shouting in chat because they don't have any friends online, and most of that would be done just to progress the story. Most things at endgame people shout for anyway, our party is no less random than it was with DF, we may or may not talk to each other, just like with DF. Only difference being is these are people from my own server and the people shouting can control what jobs are in the party and who gets kicked for doing bad.