Let's be clear, absolutely no-one is going to be using this as a weapon. It's not even a "last line of defense" weapon for home invasion, because while some may want to watch the world burn, they have different feelings about their own home specifically.
There are actually some pretty valid uses for this thing - farming an pyrotechnic displays being just two. There are a lot of people in the U.S. with large properties that could have very good uses for these things.
But basically, this is just fun, because fire is fun. Anyone who fails to see that has had irrational fear of EVERYTHING so deeply ingrained into them I cannot possibly see how they can function in real life.
People always accuse people who like guns, and now fire, of being fearful. But it seems to me like instead, those afraid of such things are the ones always afraid, and without any real joy.