That has to be the most stupid argument against motorcycles ever. I don't give two $hits what some idiot sports star contract says. Most of the described incidents involved either a.)something the rider could not control such as the hit-and-run driver or b.)inexperince by the rider (i.e. sports star) that caused him to wreck. The stars need to know the risks of riding and also the increased risk of a huge loss of money from breech of contract. I'm tired of people who have never ridden before telling me how bad it is. Do they think that just becasue some sports star got hurt I'm just going to be oh no if they get hurt I can get hurt. Guess what I already know I can get hurt and I accept that risk. If they can't they shouldn't be out telling people who have that they shouldn't be riding. It is not their, nor anyone elses place to make that decision for anyone else except for maybe your child.
Okay I'm done now.