I agree, if you're driving like an idiot (not saying I haven't ever), then there is a large chance you're gonna end up looking like an idiot. Defensive driving courses should be a COMPULSORY part of getting your licence. And then P-plate restrictions should be reduced considerably as many "high-powered" vehicles are a lot safer than many run of the mill cars. On another note power can definitely be a safety feature at a point. Too much can be dangerous and too little can be dangerous, but learning how to unleash the right amount of power and properly control a vehicle is a lot more important than the peak power that the vehicle has.
Just my opinion on the matter.
I am also a P-plater, and I have been in an at fault crash unfortunately (wasn't driving recklessly, but in hindsight I should have been going even slower than I was).
However my friend had a much worse crash (not doing anything beyond the law or being stupid) and ended up in a lot worse shape, DESPITE him driving a car with a lot less power.
Just goes to show that individual circumstance and safety features of a car play a lot more of a role than peak power.
Cheers,
Jed