Pace, you're reading what you want. Read my quote again. Does it 'indicate that some are sent first solo without those skills'?
I thought not.
My baseline personal criteria are that a first and second solo should always be go-arounds or landings, backtrack, take-off. After that, we will develop the confidence to do T&Gs. If we have been able to do T&Gs during cct training then fine, things will progress swimmingly. If students haven't done T&Gs (which I accept would be an unusual scenario), I'm not going to let the fact get in the way of sending him/her solo as we will have already encompassed the whole G/A scenario.
As for all your other stuff about spins, spiral dives etc, I would say you are being rather disingenuous. Do instructors teach to the minimum requirement or do they actually teach way beyond that to include stalls beyond incipient, spins etc? My overwhelming experience is the latter.