I've attended a couple of the triathlons that my daughter has completed and they have dozens of kayakers our there monitoring the swimmers. Maybe that just gives a false assurance. Regardless, that's a long, long way from where I am now. Cycling is my main sport and that's probably more dangerous due to the number of bikes being plowed over by cars.
I am inherently lazy and need a north star to work towards, otherwise I turn into a slug.