The rest of the world is fine with "first to file". It also works on the basis of "any disclosure before filing is prior art".
So if somebody else patents something I'm already doing, and I've made no secret of what I'm doing, their patent is dead. "Your patent is dated 1st October. Here's an article describing my process dated 30th September. Please Mr Judge, Prior Art, I can't be violating his patent. Summary judgement, please".