Agree. I would add that someone like this is important even for more senior, and even leadership positions, all the way up to C-Level. Whoever had a brush with a report or a peer that behaved badly knows that sometimes you need a second opinion not to be biased and to not take it personally.

The one thing you don't want to do is to talk about these things with a report or with a co-worker, and I've seen too many managers making this mistake with me.