One thing we've heard is that there is a perception that with human- or muscular-powered vessels, it's like a bicycle. The only person who gets hurt is the person riding the bicycle.
In the case of muscular- or human-powered vessels, there can be many more people in the vessel. It also affects people around the vessel, first responders, people who are searching for people who get lost or get in trouble, and the families. I mean if you look at the numbers, there is really no difference between the canoe and the powered vessel as it relates to potential outcome.