Now to continue this line of thinking - if HR professionals all go to different colleges / schools / training centers with different curricula and are all taugh

Now to continue this line of thinking - if HR professionals all go to different colleges / schools / training centers with different curricula and are all taught to value different aspects of an applicant, then if someone passes you up someone else might not. But if a widely used textbook or HR principle is taught to everyone everywhere, you might not get hired anywhere. I'm not saying I necessarily believe this to he an actual issue, just attempting to point out the parallels I see.