Arm has it just right, the required airspeed reduction is much less, and also the needed collective pull is less because the rotor is more efficient at 20 knots of airspeed (at zero groundspeed) so there is much more energy and more chance to fix minor glitches in technique.
Heavy helicopters are often not able to be zeroed out at touchdown, and they rely on a 20 to 30 knot landing ina full auto. The wind therefore is a real boon to big machines when they have to make power off landings.