Don’t know if someone has noted (and posted) this before, but there is a chance Chirrut was a Jedi once - and somehow he has not the power of the Force anymore (maybe because to an accident which made him blind, or he made a sort of “vote” as monk… who knows?); if not, how could a normal blind human being (apart Daredevil) do the sort of things he does, and, why the handle of his wood stick is dangerously similar to a lightsaber (that isn’t working anymore, but he still put it on some use)?
just a speculation, I know…
He has a Kyber Crystal in the End of his stick. He can Hear the Crystals not see them. Nobody knows how he wen’t blind.
I think he may have looked too long into one of those “Brightest Star’s that have hearts of Kyber”
He has incredible hearing. The Guardians of the Whills were trained fighters.