As private citizens, we can enjoy the benefits of training, practice, competition, the pursuit of a high level of technical skill, etc. What we do not get, if things go right in our lives, is experience at anything other than avoidance.
Consequently, we frequently look to the experiences of others for reference, and those people typically come from an LE or military background.
How relevant are those experiences and how might we qualify them?
As an example, Kevin B. recently commented that he had developed the habit of using his professional equipment (war belt, plate carrier, etc.) in training, even though he no longer uses that equipment professionally. He has switched to using what he actually carries and what he actually wears now, perceiving a relevancy benefit in doing so.
TLG has offered an example before too - black sights sometimes being advocated by those whose experiences are shaped being on a team with long guns, NODs, WMLs, and IR lasers - and questioned the relevancy to private citizens without those assets.
The excellent example was recently raised, 'is the best way to get a "conscripts-to-firearms-training-populated-organization" up to a basic level of competency also the best way to train motivated LE, .mil, and private citizen students?
Surely there are a great many aspects of this, from equipment to tactics to desirable skill level, and ranging from direct 1:1 relevancy to total irrelevancy. But perhaps we can discuss it and see what elements of doctrine we think fit best where.