Really? Not everything in a role play game needs to serve a story? Honestly? THAT'S the point you want to make. That a collection of random fights with absolutely no connection makes a GOOD role playing game? Is this really what you want to say?
Oh yes, because clearly that's all a game is going to consist. Your hyperbole sucks, and so does your position.
Just because there is a story going on does not mean that everything needs to cater to it, not everything needs to be relevant to it. Multiple stories can go on, and there can be random events that occur that have absolutely nothing to do with them!
That's how life works, and a game that fails to acknowledge such a thing is meaningless.
And a game where events occur that don't revolve around the PC's? Why would you as the DM bother and why would I as the player care? If something happens that has no relation to my character, then what purpose does it serve? If the dragon kidnaps a princess in a land I've never heard of and cannot get to, who cares?
You - as a player - would probably not care about things happening elsewhere, mainly because you seem fixated on the idea that the DM is going to hand-feed you a plot and you seem utterly unwilling to deviate from the idea that there is a central story going on.
The dragon kidnapping a princess in another land might not matter, but it also might. The players should be able to decide for themselves what they're going to deal with, rather than have me, as DM, decide for them. Because at that point, they might as well go play WoW or Diablo, because I have removed meaningful choice from the game.
Sorry, but I do believe that the campaign DOES revolve around the PC's. It would be like spending twenty minutes of Star Wars watching random Storm Trooper talk to his captain about the price of new blaster parts. WHO CARES?
Your hyperbole sucks again.
Just because there are things going on above and beyond the PCs does not mean that the camera leaves them. They learn of other events from their perspective; it's not like we do cut-scenes or some crap like that. If they have no interest in events not immediately pertaining to their yellow brick road, then - unless those events happen right on it - they're not going to hear about them.
I'm talking about the DM who attacks the party for no reason, other than he rolled a 1 on some arbitrary die and then rolled 15 on the "Wilderness encounter" table. It has no story, no reason to be there. It's totally disconnected from everything. That the DM now has to flail around trying to retcon his setting to fit in with this random event pretty much blows any idea of continuity out of the water.
Random crap happens all the time. Why does everything have to make sense? It doesn't. The world doesn't have a story. Stories happen within the setting, but the setting itself doesn't freaking care.
And I really seriously doubt that trying to establish where a random monster came from - a truly random monster - would seriously deal a deathblow to my setting's continuity. That's just... ridiculous.
Or, to put it another way, if the dragon shows up in the town out of the blue, one would reasonably ask, "How come no one's ever heard stories about a great big dragon that lives around here?"
If you are so unimaginative as to be unable to come up with a vaguely-reasonable answer to that question in ten seconds, I feel sorry for you and your players.