Realistic training helps keep Firefighters on their toes and they get a taste of the heat and how the real thing acts and what it can do.
The Commander gets his feet wet. He wants to see what we face when we do our jobs. This helps him to appreciate what a Firefighter does and faces when he's asked if he knows what we do and why we training so hard.
Seeing a picture doesn't let you feel the heat, but you can get a pretty good idea of how hot it can get.