This law was not introduced to ban the sale of children's motorcycles, but ever since it was made that's the way a lot of people have been reacting.
It's a law with the best of intentions, but written with a ridiculous lack of research and absolutely no comprehension for the scope of the effect it will have. Supporters are saying that it can be fixed after the fact, but why not just do it right the first time instead? And failing that, since it's already been done incorrectly, scrap the whole thing and start over.