Stall spin accidents that kill people almost invariably start at low heights.
It is better to teach people to avoid getting in this situation. If you develop a full spin at these heights (circuit and below) you will be lucky if you get it out at all.
The other category of spinning accidents is those related to aerobatics. I assume (but dont know) that spinning and recovery thereof is part of any aerobatics syllabus.
Only reason I can see to include it in the PPL syllabus would be to take the fearfactor out and show that it is just another exercise which is easily sorted
FD