Not only that but certain designs may have difficulty recovering from a fully developed, stable, spin. Thus if a keen instructor were to hold full into spin rudder and full back stick for one revolution too many, it may well be the last silly thing he does.
Nevertheless demonstrating competence in recovery from incipient spins, (say within half a turn?) is a worthy box to tick.
I’m not sure merely being able to brief the recovery actions will be enough. Or maybe it is because the possibility of entering an unintended spin in today’s designs is almost negligible such that training for it is more of a risk.
You’re right, it is a conundrum.