I agree with Don.
Have seen too many ppl with years of training collapse because in all their years they were never taught to build and maintain a serious survival (or warrior) mindset that will be able to handle most aggressor mindsets and even some killer (asocial) mindsets. Often pure, practiced rage with a singular mind set on total destruction trumps years of training simply because as far as mindset goes, the person with "martial arts" training is bringing a rubber knife to a gun fight. They may have many more tools available than their unskilled attacker but their operating system has not been trained to use those tools under the conditions of a person bent on their total destruction.
This applies to folks who have guns as well. Many, when faced with a target who is moving and will close in a matter of seconds and start to pummel, stab etc. and inflict severe damage, the same confident target shooter is lucky to get off one shot on target, and often that shot will not stop a determined attacker from closing.
Just my thoughts - mind leads body, but mindset empowers action.
Of course you guys are both right... failure of training happens, with some frequency. But the fact of the matter is that it isn't the majority of cases that represent this worst case scenario. Law Enforcement personnel routinely deal with violent offenders on a daily basis with less training than we provide a 4th kyu, in terms of practice time. I can attest to the fact that their training is remedial, at best. Yet, they mostly get away with it. Then, every once in a while, one of them dies.
There is no question that mindset needs to be part of ones training. In Aikido, it seldom is. No disagreement there. We use randori for this. With three attackers who will take you down and sit on you if you give up, folks have to dig fairly deep.
If I have a student who is a professional and very likely to encounter dangerous subjects with some regularity, I send them off to InSights training where they can do some scenarios based training with an armored subject. Greg Hamilton and John Holschen, both world class shooters and retired Special Forces, developed a solid program to augment their firearms training.
If someone is REALLY serious I recommend that they head down to Colorado and do at least one intensive weekend with Peyton Quinn. He wrote
Real Fighting: Adrenaline Stress Conditioning Through Scenario-Based Training
. This book is a must read for anyone who is concerned with application of their martial arts skills. You can check out their website (which is a bit funky) at Rocky Mountain Combat ApplicationsTraining
This kind of training experience can "cement" the skills you have been developing in the dojo. I can't recommend it enough.