I guess the FAA deems the PoS relevant to PPL training because of the existence of 6000' airports in that coutry.
That's a fair point, HWD. I have flown out of a 6,700' airfield and you have to monitor the airspeed (as a surrogate for AoA)carefully, especially as the groundspeed looks a lot higher than normal, for a given airspeed. (Because it is!)
However, the pitch of the aeroplane looks quite shallow in the climbout and as Slim Slag said it is easy to get near the stall without realising, if only relying on the "normal" visual cues from departing out of airports at lower altitude.
BEagle, I believe that your comments are fair and show why this manouevre is relatively meaningless if executed at lowish altitude.
The attitude is less steep if you do the stall at 7,000', but the lack of ground references make it less experiential than departing from a mountain airport, which is what grabbed my attention ... along with a well extended take off run.
That could make a pilot who hadn't planned tend to rotate and climb over aggressively (i.e. fear of obstacles on track) and I could see how that could cause a fatal stall/spin accident.