Nobody wants to burn bridges by telling someone they did something wrong, because the person on the receiving end of the feedback might not take it well, which will result in a potentially bitter reaction and worsening of the interpersonal relationship between the individuals in question. When you deliver feedback in public, you are instantly putting the other person on the defensive, so instead of a constructive conversation, you are now dealing with someone who has to prove their point. When you deliver feedback in public, you are instantly putting the other person on the defensive, so instead of a constructive conversation, you are now dealing with someone who has to prove their point.