Personally I do not think anyone should be playing with spins unless they have had aerobatic training.
How about "....they have had
spin training."
"Aerobatic training" is a very broad brush. It is also likely limited by the aircraft type available for the training. I have had aerobatic training, but do not consider myself compotent in areobatics in the bigger sense. My training was in Cessna 150 Aerobat, and Citabria (airbatic backward, for those who have not heard yet). I am adequately compotent in the maneuvers for which those types are appropriate, but I know that there are many aerobatic maneuvers I have not experienced, nor would attempt on my own, were I in a capable type.
I agree that intentional spins are an aerobatic maneuver, but I would say that they can be trained, and perfected in the absence of more indepth aerobatic training. I was certainly adequately compotent in spin entry and recovery, long before I was trained in aerobatics.
But, yes, aerobatic training is vitally important to overall compotence of any fixed wing pilot. I spin, loop and roll regularly, just to keep fresh.