As others have said, abrasiveness isn't a virtue especially in a role that requires others to change their behavior. There are in fact diplomatic ways to convey the same information which have a much higher chance of causing others to listen and getting everyone to adopt new processes. That someone is diplomatic and knows/care about their stuff are not mutually exclusive.

That said, depending on their interview process they may be selecting out candidates who even diplomatically disagree about the existing ops processes which results in less than stellar hires.