Cars? Airplanes? Motorcycles? Child birth? Life itself?
Nothing could be done 100% safely and 100% without harm.
Obsession with safety is what helps governments become totalitarian even in traditionally-democratic countries.
Obsession with safety is the reason terrorists win.
Edit: Personally I think betting on war is immoral and should be condemned by all sane people, but saying that everything needs 100% safety and 100% no harm is very naive.