That has always struck me as odd, as smokeless powder can be detonated much easier than black powder. Though black powder has long been used as a low explosive blasting powder. When it explodes, it only deflagrates.
I’ve thrown a match into a FULL 1 lb container of Hercules Red Dot. All I got was a rocket exhaust 10 feet high. Do that with black powder and you’re in for a world of hurt.