Should instead be they use tact when giving constructive feedback. Too many people water feedback down--scared that they might "hurt" people--resulting in the value of the feedback being lost. We shouldn't be scared to be honest with people--even if it means they might be hurt by it. It'll be better for them in the long run to hear the truth now--even if it's tough to swallow. Giving this type of feedback needs to come from a place of love--a desire to truly help, and should never be done with the intention of hurting or trying to make them feel like they were "wrong".
It should also be added: "They can receive feedback without being hurt"