Lanefan
Victoria Rules
There would almost certainly be different stories being told through those settings but I suspect the settings themselves would be easily recognizable as the same (barring, of course, "after-market mods" such as some PCs blowing up a major city or sinking half a continent).If any of us took @robertsconley's setting and ran it for our own groups, within a very short time, each of our settings would progress distinctly from each other. Your setting, my setting and the original setting would look very different.
After-market mods would also include to a specific DM's homebrew alterations, e.g. changing FR such that Neverwinter is the massive city and Waterdeep is a smaller port town. But thousands of campaigns have been run using the FR setting with few-to-no alterations and I'd posit that in nearly all of them the setting is basically the same except with some different specific protagonists doing stuff.If the setting had any sort of independent existence, it shouldn't though. After all, it shouldn't really matter who is running it. If we all bought the same car and drove it for the next year, by the end of the year, those three cars would be pretty much identical. Superficial differences only. (Barring, of course, some after market mods)
The same would be true if we all took robertsconley's setting and ran it as our own.
In the case of a bespoke homebrew setting, maybe; in large part because the inventor of said setting might have much of the info in his-her head rather than written down thus making it very difficult for another DM to run the same setting the same way.So, no, I reject this notion that the setting is somehow separate from the DM of that setting. It can't be.
But for published settings? Yes, the setting is largely separate; the DM is just borrowing it.