FNG
Any instructor who is not proficient and confident in spin recovery should not be allowed to fly as P1 with (a) any pre-licence student or (b) any student at all.
You may be right, I don't know. The counter argument is that the only time a GA non-aerobatic pilot is going to get near to stall/spin is when turning base-final and overcooking it, and then he may well be too low to recover from a spin. Therefore, spending time to teach IAS maintenance/control as an essential safety procedure may be more important overall. Let's face it, the time is limited. Very few people do it in 45hrs (those that do usually got very lucky with the weather) and most people that do a PPL don't really want to spend any more money than they see as necessary...