I must say I agree with Robin Pilot. However the basic issue seems to be the nature of the flying people have actually done since gaining a licence. Those who have just toured around Europe, or wherever, or gone on to multi-engine flying,and assume their students will do the same, generally seem not to see the point of, in particular, spinning.
Frequent visitors to farm strips may take a different view.
The notion that an aeroplane is bound to crash if it spins at circuit height is often expressed but is simply not necessarily true with many, certainly older, types of aeroplane and possibly pilot. Obviously a multi turn power on flat spin is going to result in a pile of wreckage but a half or even one turn spin, properly dealt with, can often be recovered inside the available height. Anyway, no reason to give up and wait to crash because the instructor said it could not be recovered so was not worth learning.
I really do not like the idea of a pilot learning an 'incipient' anything without experiencing and fully understanding to what it is incipient.