And I might add, using water anywhere near the track for safety really doesn't work IMO. Ever seen a 150 mph hydro skip multiple times and then dig into the water when out of control. Not pretty. And hitting water at high speed is a lot like concrete. Additionally it would likely spray the track in the other lane ruining his day. And 6" of water can drown someone. Imagine 6" of water being scooped up at hign speed by an upside down car with its windshield blown out. AT Mororos years ago on the road race course a sport car flipped upside down and slid thru the wet mud off course. The drivers compartment filled up with mud and he died before they could remove the mud and extract him.

The safest track likely would be 2 high concrete walls teflon lined only inches wider then the car and totally counterproductive to typical racing

Everyone now gets to choose how much safety they desire, or don't race.

Reality check, that half the population is smarter then 50% of the people and it's a constantly contested fact.