You make some good points, eg staged licences, pass the test to get access, makes total sense. Having a full bike licence, I appreciate the difference from my L--Plate days on my Kwaka 125, to my current Honda CBF1000. As you say, power is nothing without control.
Lunatics and bad driving are across the board, bhp has nothing do with it. There are utter pillocks in all sorts of machinery! We need a lot more enforcement on our roads, another 100x Octi VRS.
Having covered 50k in Citroen 2CV & Dyanes, I can't say that I ever felt unsafe because of the limited power. Unsafe because of the lack of crash protection most certainly, but not sub 30 bhp power reserves,
Has power ever got me out of trouble? Do you know what, I can't say that it has. Defensive driving is what I practice daily. I've enjoyed big speed, but mostly, safety and defensive are my priorities. As I said, our roads down here are too busy to use power.