Scooters just don't have the geometry to ride fast safely, they are incredibly prone to flicking the front wheel out and chucking the rider on the ground. The only way they can be ridden safely is riding relatively slowly.

"Hasn't crashed yet" is different to "safely"

Because if they are riding it safely, there would be no need to bypass the restrictions.

There is reason for speed limits, they are not there to f--k with people for fun.