I remarked when I bought my first AAD 15 years ago, that I would feel really stupid going in with $1200 left in my checking account.
One can debate all they want, but risk management is about playing the odds. If you push the limits hard enough, an AAD can cause problems. But they have saved way more lives than they have taken. I have over a dozen reserve rides, all by the book, no problems. I still use an AAD whenever possible, because I never know what will happen on the very next jump. Jim Lennox never expected to get knocked unconscious on a 12 way jump at LP this summer, but he did.
I used to be the young guy with the little kids. I would have hated to leave them like that. My deepest sympathies to the families.