I agree with Big Pistons, that there is no reason for a pilot to blunder into a spin during general aviation flying.
The only circumstance I can think of is aggressive avoiding action in a close airprox, but the probability is pretty low.
Much more likely to get into trouble in the circuit, where you would be very lucky to recover, stall/spin avoidance training has always made a lot of sense to me.
One of my US instructors told me, a long time ago, that if you did manage to get a PA28 taper wing into a spin (which, he said, in itself was no mean feat), unless you were in the utility category, it might spin flat and be unrecoverable, this being one of the reasons Piper never sought spinning certification.
Anyone else heard that one? True or urban legend?