Morose, if you weren't trying to rag on people, why did you choose words like "lazy" and "adolescent"?
You still cling to a couple misconceptions...
Save-the-world games are no more easy to write than any other game. The difficulty in writing a game does not come from the general premise (be it save the world, save the town, save your own skin, get the beer, or what have you), but in working up all the details. And whether the world is threatened or not has nothing to do with coming up with intriguing details.
Similarly, having a taste for save-the-world games is no more or less adolescent than having a taste for RPGs in general. The game is about doing things you cannot do in real life. After you've made this escapism a hobby, the exact details of the plot hardly make you more juvenile.
Saving the world does not require "superman" characters. Depending on the details of the story, you can save the world with supermen, with mediocre stat and level characters, or with first-level commoners.
So, perhaps you should practice what you preach - open up your own mind to a possibility you haven't considered: A world-saving game that doesn't fit your own preconception of them.