Li Shenron
Legend
I definitely wouldn’t want to play with a DM who views any compromise on their precious campaign vision to be bad gaming.
It's not really about having a "precious" campaign for me. I know that players care nothing for whatever worldbuilding a DM has done.
For me it's all about escaping the vanilla flavor by either (1) sticking to a narrow theme, or (2) choosing a published setting.
As a DM I dream about eventually being able to run many campaigns each with a different theme, but if every time I make compromises that break the theme, I find myself always pulled towards that vanilla result, and never really ticking any theme checkbox off my list.
When it comes to published settings, I want to stick with defaults because I want to relive/share a similar experience with thousands of gaming groups that came before. If I ever play Mystara (just because it's being mentioned, thought I don't know what it is about), I want to know how it feels to play the same Mystara that the majority of those groups have played, not a setting polluted by elements that have nothing to do with it, otherwise I might as well just play once again that random vanilla campaign.