As an Australian the problem is largely what you imagine.

An unregulated industry brought in bikes that were closer to motorbikes than pushbikes and parents didnt do their due diligence on it. The same industry also brought in a huge amount of bikes that were perfectly sane when stock but were literally childs play to turn into something closer to a motorbike. Now the vast majority of kids went out and did kid shit and they were slightly annoying, a not insignificant number of them got hurt, but there was no real outcry.

The govt as governments are want to do reacted way too fucking slowly in putting sane limitations on what could and couldnt be sold and hold manufacturers and importers accountable. In their defence partly because 90% of them are coming out of china and the govt arent idiots in that they know how easy it would be for an importer to find a new frontman and the Chinese manufacturer to rebrand and force them to play whackamole and partly because they are very popular among adults and people who arent riding them like dickheads AND they didnt want to look anti-green by discouraging people to find car alternatives.

But Here come the fuckwits like takeovers are to “legitimate” street racing on quiet backroads, kids started doing wheelies through shopping centers while filming it for the gram, deciding it would be funny to absolutely destroy the grass and surfacing on local sporting fields and swerving in and out of traffic in 80 zones.

Its not that the cops dont care, the cops know what the reality is that if they start trying to catch them, the kids will run and eventually someones “good boy who never hurt anyone and loved to laugh” is going “to be chased to his death over a modified E-bike and the police are the reason for his death” regardless of what prompted them to chase him in the first place.

All in all its a 3 layer shit sandwich.