My interpretation is that one should consider pedal force rather than cadence.
One's body is optimized to lift one's own weight with either one or two legs, although not necessarily repeatedly from full flexion.
Anyway, once one hits 100% of one's weight, then more downward force picks oneself off of the saddle, with two options, pulling up to increase force, or increasing cadence. Pulling up is limited in power, and perhaps good for short bursts of energy but not necessarily long endurance pedalling.
Thus... more power ==> higher cadence
But, if one isn't racing, then there is no reason to be running at 100+ RPM.
What is the optimum cadence? It may well vary from person to person, as well as varying with training.