I don't think that WFR is primarily useful to guides, camp counselors, etc. If you look at it purely from a SAR perspective, then yes, WFR is overkill, as by the time SAR gets to a subject the person is typically stable or dead (which is also stable, I suppose).
There is a lot of material in WFR that even your average weekend warrior will benefit from, however. The two biggest advantages are protocols for clearing c-spine and for reducing sprains and dislocations. These both give you a shot at self-evacuation when you're far from the trailhead by hopefully allowing the subject to be (somewhat?) mobile.
Yeah, there's a lot of crap in WFR about dental emergencies, organizing a search for little Johnny, dealing with diabetic episodes, etc, which is of secondary utility, so go ahead and bite the bullet and commit the 80 hours...so bite the bullet, get it and keep it current.