[clarky07]

For the population as a whole maybe. That doesn't take away the not insignificant risk to any one individual of being killed or crippled.

Biking "could" give you an increased life span of 5-10 years IF you don't replace it with other exercise. In exchange for this, you have a slightly increased chance of being crippled or killed far sooner. There are arguments to be made on both sides, but don't dismiss his argument as being unreasonable. It's not unreasonable at all. I can happily get the benefits on biking on a closed course or at a gym while not subjecting myself to the dangers of biking near people in cars that don't always pay enough attention.