He pretty much reflects my thinking on the subject.
I'd LOVE to take a so-called carbine class. Mainly because it'd be fun and help toward familiarization and I'd get to do more dynamic things and get tips and corrections I can use for all rifle applications.
But would I ever need such training for house-clearing and door-kicking? Nope. What if the SHTF? Nope. What if it was REALLY bad SHTF? Still nope. What if you waved a magic wand after the SHTF and made me 25 again, young and strong? NOPE. It's a skill for trained uniformed people where it is their job. It's nice to know stuff about brain surgery, just to know, but to DO brain surgery? Or even an appendectomy? I'm not going to be doing that either, no matter how badly it's needed.
I want to do pistol training much more than I want to do carbine training anyway. Much more practical for someone with a CCW.
I want to do long range rifle shooting more than carbine training, too. It has more real world application for super-SHTF situations, and, more likely, for hunting. If you can hit a paper target 500 yards away, taking a bead on a whitetail 180 yards away can then be a much simpler matter