Studen
The problem with spinning is that no two spins maybe the same. ie same aircraft different loading and different spin. Even same type aircraft, different aircraft, same loading different spin.
You are somewhat in the unknown hence the caution. If you spin at low level chances are you wont recover hence I believe the reason to only go to the incipient stage.
Should you spin for real? The answer has to be a resounding yes. In the same way should you take a car onto a skid pan? Yes it makes you a more confident driver to operate beyond the realms of normal driving grip.
The same goes for aircraft but please do it with plenty of air below the aircraft.
Pace