Heat sells. It gets clicks and comments and shares and is the primary tactic used by the average media. Some heat is good, no doubt. Truth can be a type of heat that we need to refine us.
Light, on the other hand, can be used to showcase goodness or draw our attention to a problem, but it does so without inflaming the situation. Generating light instead of heat is a skill for sure, and it's one that every man should hone.