The net torque is neutral, but that's not the same as saying the torque produced by the engine & prop during climbout is the same as the torque produced by the engine & prop during cruise.
"Gyroscopic effects" when taking about right rudder aren't talking about the rotation of the airframe, they're talking about the high-speed rotation of that big noisemaker up front (assuming single engine.)
"High power output" is irrelevant if you aren't talking about torque and gyroscopic effects. A rocket also has high power output.