Like I said, I think I'm just not going to get it. I've run games in Middle Earth, Dragonlance, and the Star Wars Galaxy, and never had any problems.
In Dragonlance I've played in a game that put the PCs into the War of The Lance, and we ended up as dragon riders. We saved the world, and the DM indicated indirectly but strongly that at least 2 other world threatening things were happening during the war as well, not even counting the so-called Heroes of The Lance. We fought 2 different Dragon Overlords, and stopped Takhisis from creating a line of half-dragons with her own blood in them as a "if this war fails the world will burn for it" contingency.
In Middle Earth, we helped Gandalf destroy the Necromancer in one game, and in another the players played Dwarves who stopped the nations of the West from being overrun on a whole other front (an event referenced in the Lord of The Rings), and another had much lower stakes and was set in the default time period of the The One Ring game.
In Star Wars we played in every possible era over the years, in core worlds and outer rim and unknown regions, as part of the Rebel Alliance, Jedi, Republics new and old, and in sectors and with organizations we made up.