When a preacher or teacher has made statements or engaged in actions some find questionable the response is often dismissed with – but no one is infallible!
True, no one is infallible. But does that lead to the conclusion that no one is questionable? Or accountable?
Graceful questioning without an ulterior motive is not a bad thing. Questioning does not mean condemning, but may just be needed for clarification.
Ironically, when someone is sinning we don’t excuse them with – but no one is infallible! Nor does Scripture allow that excuse when confronting false teachers, unsound doctrine, wolves among the sheep, etc.
Of course, I’m not saying that walking away in disagreement means damnation. But two can’t sharpen the faces of each other if one is turned away.