Actually it's pretty smart
It basically tells you that you don't need to have the best of everything just to be sub 20, a decent fingertrick, a decent lookahead, a decent use of inspection, a decent knowledge of the method you use , and a decent turnspeed you should be able to be constantly sub 20
You can definitely gain all these by simply practice
A sub 30 cuber should be able to grasp all of those simply by practicing a few weeks, probably another month should be enough