OK,  then I'm still not following you about your '*much to complicated*' statement.   Every professional queen breeder I know uses grafting for queen rearing, myself included.    Grafting is not feasible for the average novice as it takes practice and continuous use to maintain the skill, not to mention additional equipment.   Yes there are other none grafting methods, but in my experience OTS has been easy to teach to students, they comprehend the process and need no additional equipment.   I have a lot more novice beekeepers raising their own queens now that I teach OTS than before OTS.

As far as 'artificial swarm'  terminology,  I used it in reference to the mother hive in which the queen was removed from.  In their perspective,  the queen and a partion of the bees leaving is 'seen' as swarming and it will prevent/remove the swarming impulse. The removal of some brood with them is irrelevant to the way the mother colony reacts.    Yes, you are correct that the nuc made from this removal is not an artificial swarm in itself.