About 20 years ago I was in a Suzuki motorcycle dealership and a kid (just 19 or so) walked in to buy a 1000cc "crotch rocket". He'd got his license riding a 90CC Yamaha. It was all he'd ever rode. His uncle was giving him a gift for passing his 1st year of college...a new crotch rocket and enough $'s to spend the summer riding to the West Coast and back. I thought the dealer was unconsionable, selling a loaded weapon to a kid. However, it was obvious the kid would have bought the fastest bike he could, where ever he could. On reflection, I think the dealer, and perhaps the uncle, deserve a "Darwin Award" for restriction of the gene pool. Unfortunately, depending on how you look at it, the kid never made it out of the state alive.
I've put several hundred thousand miles on motorcycles. All the time a little voice in the back of my head said "the pavement, and nearly everything else, is harder than your body and sooner or later you will go down..."
Basic safety and use training would be great. However, as pointed out, liability issues make it really tough. I received nearly no information or advise when I bought the 4115. I'd driven a couple of farm tractors, during my teens, helping with haying. That was all I knew of tractors. So, I read the manuals cover to cover, especially the safety warnings, before delivery and did everything very slowly until I began to understand the limits of the machine. Still, I rolled it with something around 50 hours on it. Such is life. As with my chainsaws, all other power tools, and...dare I say firearms(?), if I start it, move it, or fire it, I'm responsible.
"Intelligence is finite...the population is expanding......" [unknown source]