The truth of all of this is that all controls have primary and secondary (and even tertiary) effects - and the balance of these is different for different a/c types. I get really nervous about any statement that says 'never' - there are circumstances when a free-ish thinking mind will save the day by doing the right thing rather than following the 'correct' dogma.
I have experienced a stalled wing in the cruise during turbulence - trying to bring it back up on ailerons made the drop even more severe (as would be expected) - a sharp nose down to gain speed effected an easy recovery. Had I had a passenger on board, this would probably have been quite frightening for him/her.
However, I have also experienced a very sharp wing drop in rotor effect near the ground, on final, and in this case took it out with rudder - I did not have sufficient height to drop the nose, and for the same reason would not risk using aileron - don't know if the wing was technically stalled in that case or not, but rudder did what I wanted. If I'd had a mindset that said I should use aileron not rudder in all cases, I believe I would have acquainted my face with the tarmac, shortly followed by my posterior.....