I dunno about the notion that the more experienced one is, the les rudder movement there is. I've been spending a fair amount of time over the last few years in Dromaders and Air Tractors, and I've had many days when my knees hurt too much to get out of the airplane after a flight, or at the end of the day. No shortage of rudder work on takeoff, landing, or in the air.
A comparison between those two types, however, shows a considerable difference in the way they fly. The Dromader often takes full throw control movements in turbulence with rudder and ailerons while working; the air tractor takes frequent constant small movements and isn't tolerant at all of over controlling.
Even a simple Aeronca or Cub can keep you busy, especially if it's gusty or windy with obstacles near the runway such as trees or buildings. On a dead calm morning one might be able to let ones feet sleep, figuratively speaking, but generally they should be wide awake, and fairly active, such as they may be needed.