I don't think anyone is assuming they can't be wrong. I think it's more that the post said this was a bad move "with authority" when you don't have all the info

I don't think anyone is assuming they can't be wrong. I think it's more that the post said this was a bad move "with authority" when you don't have all the information unless you actually were involved with that decision. It might be a bad move still but we don't have all the information necessary so it's strange to just assume we know better.