I'm of course speaking in overall terms, just used story as an example. I think people read way too much into Mario, Nintendo isn't out trying to make citizen kane when they make it, they just do some good level design that results in fun gameplay. Case in point: I fail to see what you are saying that Mario compares to Beowulf.
So a game where a fat plumber jumps platforms and gathers powerups and coins somehow equates to an epic long form medieval poem?
I'm not sure i'm following that train of thought, and I don't mean this with sarcasm or anything, I really don't get what you're saying.
Because if you're saying it's a "classical" way of doing entertainment, that just means it's meant to be immediate and satisfying, I fail to see classical literature in there. In fact, Mario is anything BUT literature, and I don't mean walls of text.
Like I said, I think people read too much into Mario that they end up projecting stuff in there that just isn't there.