I agree that trust and consensus are not scientific concepts (well, except maybe in psychology or sociology, but that's not relevant here). But they are things

I agree that trust and consensus are not scientific concepts (well, except maybe in psychology or sociology, but that's not relevant here). But they are things it's reasonable for those of us who aren't expert theoretical physicists to take into account, when Some Guy On The Internet says all the professional physicists are wrong and he's found an internal inconsistency in general relativity. The "larger region" you need to look at to determine whether K applies is not small enough for the defining characteristic of the small region -- i.e., that spacetime curvature is negligible there -- to hold. The equivalence principle stops applying once you start considering regions large enough for spacetime curvature to be non-negligible within them.