My brilliant STEM educator friend Dr. Claire Meaders often makes the point that selection, attrition & gatekeeping are not the same thing as "rigor" in STEM pathways. The same can be said for any hiring and evaluation of junior folks. Maybe a metaphor that would work here is leaning on "only x% of applicants get one of our jobs" is like the Lines of Code way of measuring evaluation efficacy. If you built a super great identification system the majority of the identified could qualify.