We've taken Advanced Firefighting, a five day course. I think we respected fire before, but it was always something we knew we'd just call the fire department on and they'd come deal with it. I know some others here have taken the same for their licenses. Most courses we've taken have been fun. It was not. It was hard, scary, and exhausting. We had to actually fight fires in an academy. Then they had a simulator on top of that which created all sorts of incidents. We learned that fires are hot, scary, and you don't have much time to do anything. Then as a boater, knowing when to get out of there is critical. You must manage lives ahead of the boat. On television and in movies you see firefighters go into burning homes to rescue people. Well, boats burn much faster than homes. Do you have a way to notify everyone on board and tell those below in cabins to get out? What would you do if there was a child asleep in a cabin?
Fire extinguishers aren't for putting out house fires or boat fires. They're for putting out a stove fire such as a pan on the stove or a candle fire such as a candle in a chair burning it or a very small rag fire in the engine room, but once you can call it a house fire or a boat fire, it's beyond your ability unless you have real fire hoses and equipment. Now, you are seeing some marinas with fire hoses on the docks and a very few even with fire boats.
I hope to never find out if we can use what we learned.