trouble is, they would just become underground and get shipped in from abroad and sold on the black market - there would be none of the controlled displays, the strict regulations for manufacture, saftey advice, and the refusal of sale to children - or any of the current safeguards in this country.
at least now, you know that the fireworks you have bought are well made and will act in the way they were intended, rather than substandard, made-in-a-shed, blow-up-before-you-even-touch-them, melt-your-hand ones