That's a key statement to understanding piro rates in HH. In HH, the stick position is a RATE command to the gyro ... not a position command to the servo.
The rudder stick position is interpreted by the gyro as a RATE in which you want to YAW. For any given stick position (including center stick) ... the gyro will move the servo as necessary (within the limits) to maintain the "commanded" RATE.

So if the result of full rudder stick is a piro rate that is too fast for you ... either don't move the stick as far ... or change the rudder channel end points so that even at full stick deflection ... you are not "commanding" a high piro rate. The gyro still operate the servo as required to maintain that piro rate.

Remember ... the gyro can still deflect the servo to the set limits even at center stick (0 YAW rate) if that's what it takes to hold 0 YAW.