This is correct, and I appreciate the furthering of explaining why sparklers are deceptively dangerous.

People just assume its like a more familiar kind of fire and thus dramatically underestimate the danger.

Also I was going to mention the bomb thing but I decided not to, but uh yeah lol, its kind of wild that shit is legal at all, given that its pretty fucking easy to make a significantly dangerous explosive out of and, at least as far as I am aware, you basically buy all that shit with cash, unlike other types of chemicals which can be made into bombs which are pretty heavily monitored and regulated.