I simply do not believe training although good, is as important as having the right stuff. One is either a killer or not. Being a killer does not mean one is evil. Robert E. Lee and Stonewall Jackson were both killers but very good men. Of course one can be a killer and also evil.
I simply do not agree that .32's .380's or even .25's are useless. As a matter of fact, the .32 and .380 are about as effective as the .38 special which IMO is itself much better than most experts say.
There are plenty of people who are cool headed enough to shoot not just for the head but between the eyes. Some go to pieces and couldn't hit the broad side of a barn when it comes down to it.
You are plain wrong about head shots. They are for snipers, not homeowners. The standard LO training discourages headshots because they are so difficult. I'll trust their opinion on this. Also, .22s, .25s, .32s are better than nothing but there are reasons why our military and police don't carry them. The .38 revolver is still part of the USA arsenal.