I agree that most leaders will now they are fallible, and also have some idea of which things are problematic. As an inexperienced leader, I still valued getting "known feedback". It gave me a better idea of which problems were growing too large, and which ones remained minor annoyances. In addition, acknowledging the points that were brought up and explaining why I hadn't gotten to addressing them (besides being human) usually gave the person giving the feedback a more positive outlook.