I disagree that any increased mandatory training will significantly reduce motorcycle stupidity, I mean accidents. There is too much regulation in the world already. What might decrease stupid behavior would be more severe punishments for the stupid, be they on motorcycles, cars, using guns, carelessly using other dangerous tools or recreational items, etc. Then make sure everyone knows the penalties for their stupid behavior if they are not responsible with their actions. Individual responsibility should be taught to all young people in school and parents must be responsible for the actions of their children, until they are old enough to be responsible for themselves.
I am now 53 years old and ride my Suzuki 400 DRZ super moto pretty well after not being on two wheels for about 25+ years, but I must admit that the first month of riding again, I had a little incident. I was riding the Kawasaki KLR650 to work one morning, probably the 4th or 5th time on a bike after the long gap of not riding. I was at a stop light in traffic and was surprised by the light change, as I was expecting the left turn light coming towards me to activate first, so I was not prepared to move. I sort of paniced and ended up popping the clutch and pulling the highest and longest wheelie of my life all the way across the intersection. So high that I had to take my feet of the pegs and lay on the seat and tank to prevent from going all the way over. I managed to get the front wheel back on the ground and drag myself back onto the seat and make it to work safely, but it was an extreme adrenelin rush and not something I ever want to repeat. My Suzuki 400 DRZ with aftermarket performance exhaust and a couple of other mods has the same, or more horsepower as the 650 Kawasaki did, but it is much lighter and more fun to ride on the twisty mountain roads.
I don't know if I will ever be a big heavy bike rider, like the harley's and over 1000cc japanese, or german bikes. My very first bike at age 16 was a 175 CZ trials bike.