Excellent post, Pax - I particularly key on the difference between those who view is to protect themselves primarily vs. those who explicitly postulate a role in a high intense critical incident surrounded by others. IMHO, controversial, they have the moral duty to train to minimize harm to innocents.
That a core issue in my analyses and a practical one in advocating carrying. I would like those who make that latter point have training as it would strengthen my hand in argument.
The expense issue is well taken for the poorer, folk, single mom, stalker victim, etc.
If expenses could be a problem, for the committed dedicated, around here - we could probably come up with some discounted training.