X citation and others
Essentially what is being inferred here is that stall testing is done with a lot of potential energy. ie at a high altitude and not close to the ground.
In this context the comments (some of which have been allowed to stay) make sense. One does not practise stalls close to the ground even in a c152!
However your later comments re selecting flight idle and equating that with low energy are incorrect. For stall recovery the sequence has to be reduce the AofA then a short while later increase power. Selecting toga or equivalent merely causes a pitch up which makes reducing the AofA almost impossible.
Increasing the power does not increase'the energy state of the aircraft'.
In a stall situation you do not go faster nor do you increase altitude, you merely descend in a stable stall like AF.