When my kids were young, I let them buy dirt bike, go karts, quads, jet skis, snowmobile with my supervision. I think they came out really good and understand their weaknesses & danger. Knock on wood, both are really good driver & never had any accident. Lots of young kids dying driving.
I caught them with snowboard jumping on the roof top of my house, pulled by hi-powered snowmobile. I was wondering why every summer I need to replace my rain gutter.
The moral of story -- with proper supervision, I think the kids better off to learn & face the danger early.