Its quite interesting to see how the main focus of blame shifts with age, according to UK police reports with under riders under 24 its the cyclists actions that are deemed to be to blame for the majority of accidents, with older riders it is the motorists. 16% of serious cycling injuries are also received without aid of a 3rd party so obviously there is some plenty of room for some rider to reduce their risks.
Citation.
Knowles, J. et al: “Collisions Involving Cyclists on Britain's Roads: Establishing the Causes", TRL Report PPR 445, 2009
Also according to RoSPA, 4 out of 5 injured cyclists are male, which suggests that either us men are more reckless or we outnumber women rides by a factor of 4 which I don't think we do.