It's not that the NCAA committe uses the PWR, the PWR uses the committee's method of selecting the field to "predict" (with 100% accuracy) who will make the field.
H2H is only one of the factors the committee uses. UW had a better record against Teams Under Consideration (TUC), and common opponents, as well as a better RPI ranking.
The "human element" is non-existent now in the NCAA field selection, like it or lump it.