Accidents happen in boats, cars, and motorcycles. Motorcycles are the worst. Watch some of the videos that are posted on facebook of motorcycle accidents. The grandson of a couple we know had a horrible motorcycle accident four years ago and now had another one and may not fully recover from a brain injury - and no health insurance.
How many of us have hit objects in the water at much slower speeds than the boat in the video. How could he avoid, say, a large tree trunk in the water at high speeds. My classmate from high school died after a high speed boating accident in Sept of 2015 in Champlin, on the Mississippi river.
Speed is fun but I'll keep it under control, wear a life preserver, hook up to the kill switch, and watch the water in front of me.