I'd describe that as "handling" rather than "airmanship" but whatever, it's easy to take such a view if you have been trained in spinning. Not so easy if you haven't. And yaw can be introduced by asymmetric thrust without any need for an unwise application of rudder. So, add "don't stall in an asymmetric thrust condition" to your airmanship list. Everything would be fine if people would just stop screwing up.