None of our policy is "imposed from on high", it was all created by consensus. And it can still change by consensus.
I don't think that's true. As I understand it, NPOV (as a basic principle) is imposed by the foundation (obviously, it pre-dates the foundation, but now there is a foundation, they impose it), and can't be changed without their approval. Same applies to the basic principles of the use of non-free content.