Imagine that after ppl have burnt their fingers using toasters the state decides to ban toasters. A week later online shops have to stop business within 2 weeks. Some online shops may stay in business for an additional month because they've never sold toasters....
your analogy is wrong.
people never burnt their fingers with toasters. instead it was shops selling toasters illegally without license to sell toasters! so the government came to them and said "who let you sell toasters, we are closing you down". and people continued using toasters and buying toasters from those shops that had the license.