Power on stalls can happen rather easily when taking off at high density altitudes. Good idea to be able to recognise and recover from them.
Re BFR's and rudders: my last BFR was with a right malevolent b@stard CFI who made me spend well over half an hour at and beyond the critical angle of attack with both power on and off. In fact we did little else. It didn't take much turbulence to make a wing drop, and rudder was used to pick them up. We were quite prepared to spin and were in a suitable machine. Remarkably good practice and something that everybody should be comfortable with and be able to demonstrate to an instructor.