I am surprised that you are willing to make a statement like that without a shred of statistical support.
Not a shred of statistical support? The AC45 multihulls have been sailing and racing for two years now and done an incredible number of hours without any serious causality. Multihulls almost the size and speed of the AC72 had raced for years without any serious causality. The 6 SC72 on the water have made a good number of sailing hours with only one bad causality that eventually can be attributed to bad luck and the use of an auto inflating PDF.
I would say that without being a closed case facts seem to indicate that this series is not excessively dangerous as some want to make belief based in a random accident that resulted in one death. Death in accidents happens in all speed racing, are an unavoidable consequence of that type of racing. Sure, everything should be done to lessen the risk, if that is an excessive one. It remains to be seen if it is the case. Evidence till know does not point to an excessive risk.
It would be pretty straightforward to calculate a TRC and fatality rate for a common class of monohull racing, and then do the same for the AC72s so far, and compare the rates. Then you get a much better picture of how safe/unsafe the AC72s are relative to other boats.
It would be a lot better than simply saying "only two accidents and an unfortunate dead." I suspect that a calculated TRC would show these boats to be much more dangerous than any predecessors.
Probably it is only you that sees the necessity of proving that the old mono-hull AC racing was less dangerous than the present one.
Get slower and even older designed sailboats than the old AC monohulls and the danger will be even smaller. Who wants that?
The Danger in what regards racing has much to do with speed. It makes no sense to have the F1 of the seas cup raced on old and slow sailboats. They should be the top in what regards speed and design and they finally are just that. Of course they are more dangerous to drive, so it is a F1 regarding a Tourism race car....so what?