> impossibility of enforcing fireworks bans

Because fireworks are not usually homemade, enforcing bans is pretty easily done by cracking down on retailers who illegally sell them. They are easy to find (have to advertise) and have a lot to lose by breaking commerce laws. Notably, cannabis grows naturally in many climates in the US (so retail not strictly necessary) and we still ban it.

IIRC our state long prohibited the kind of fireworks that go into the air (roman candles, etc.) and only allowed sparklers and similar ground-effect pyrotechnics. Of course, the odd person would drive hundreds of miles with fireworks in their trunk, but overall the ban was fairly effective.

> No one is motivated to actually enforce it.

All that said, I am a fan of removing laws that continue to exist only as a pretext for targeting disfavored groups. A lot of the rot in the country is downstream of us not really being a nation of laws.