IrishScott - I can see your point regarding enthusiasts, if it were simply a matter of the physical act of operating a weapon in the proscribed manner. And for the record, I am in favor of responsible Concealed Carry and of ownership in general.
Having said that, I would respectfully disagree with the 'class completely unnecessary' part of your post on the premise that the there is a whole set of Legal and Social realities, plus potential liabilities that go along with a CCW; and that the basics of these are fully worthy of instruction. If something ever happened, (we) would call a lawyer as a matter of course. But a little foreknowledge can go a long way. Police receive this instruction (in some detail) as part of their training so they understand the when/where/how/why of a legitimate usage. I don't think it's unreasonable to require the carrying public to also be provided at least a working subset.
Basically, that's a slightly long winded way of stating .."if you're going to carry, you should know where you stand with respect to the rules and a class can serve to teach you..." If it's the case that current classes do not cover these (adequately?), then I would opine the class' objectives should be revisited.