I know this is anecdotal and we need to be careful about extrapolating personal experiences, but just about everyone I know (myself included) Is putting themselves at greater risk as a result of their own behaviours and lifestyle choice (including, inter alia, diet, sedentary lifestyle, alcohol consumption etc). I've never smoked and am teetotal and enjoy cycling (now there is a question, does the exercise benefit outweigh the greater risk of being injured/killed in a road incident? I'd say yes, but cyclists die in accidents quite regularly) but my dietary choices are terrible.