I take it you are intimating that the only source of hazard to cyclists is drivers of motor vehicles. I would suggest that the presence of vehicles at all, however well driven, is a hazard, especially when combined with various other environmental issues such as rain, ice, wind, and your potholes and white lines etc, and that the hazards presented by all these factors - including those drivers who aren't too clever - is exacerbated by lack of experience and education on the part of actual and potential cyclists, and that this can and should be addressed. That is not to suggest that drivers and their role in the hazards presented to cyclists shouldn't be addressed also - they should, and urgently and with vigour - but to suggest that urban cyclists can do nothing to improve their own chances of survival to a healthy old age is not a credible argument.