The man with the clipboard was talking codswallop.
PFLs and stalls, different approaches - all should be practiced regularly, by all pilots - otherwise they'll still be trying to work out what to do when they screw up after a real problem.
You may have just given the man in the tower too much information - you are captain, and controllers have limited say in what you are allowed to do with your aeroplane. Just some of them aren't very good are recognising that.
Me? I try to practice a couple of stalls, at-least one PFL and at-least one different approach every month. I should probably practice EFATOs more often, but certainly practice those every few months also. PFLs I generally go-around from once I'm absolutely certain I'm okay for the field, which is typically somewhere between treetop and hedge height.
If you want to turn the engine off, that also is legal. Depending upon the aeroplane and runway, possibly stupid - but perfectly legal.
G