Applying large modern transport aircraft techniques blindly to typical light GA aircraft is as inadvisable as applying light GA aircraft techniques blindly to large modern transport aircraft. Similarly techniques for specialised military aircraft may have characteristics that separate them in nasty ways from both of the previous categories.
Indeed even within the GA fleet, there are differences in techniques - eg spins in a Chipmunk, Tomahawk, Pitts, Decathalon, Aerobat or Cirrus etc, all differ to varying extents.
Train pilots to fly the aircraft they are operating, and hopefully train them in a way that makes them adaptable as (or if) they progress between types...