I appreciate what seems to be a sincere sentiment, but at the same time I don't feel like it's my place to point out to a stranger that her, say, sedentary lifestyle or drinking habit is a health risk.

The article disagrees with you.

>> Public health researcher Jason Meggs found that after Idaho started allowing bikers to do this in 1982, injuries resulting from bicycle accidents dropped. When he compared recent census data from Boise to Bakersfield and Sacramento, California — relatively similar-sized cities with comparable percentages of bikers, topographies, precipitation patterns, and street layouts — he found that Sacramento had 30.5 percent more accidents per bike commuter and Bakersfield had 150 percent more.