The other thing is that the reported x/w is measured at the top of quite a tall pole; 10m I think.
So the actual xw seen by the aircraft when about to touch down is a lot less than that reported.
This is why the aircraft normally straightens out by itself, to a large degree or sometimes even all the way to the runway heading, during the flare. Unfortunately, the inertia in yaw eggagerates this effect and one finds that a lot of rudder is needed pretty quickly.
A 20kt genuine x/w is not easy to land in. One needs loads of rudder, loads of opposite aileron, and courage. This would correspond to something like 30kt reported x/w figure.