HR doesn't have the same motivation that direct supervisors have. I've seen HR reject great applicants and send forward complete mismatches. I've witnessed first hand where departments would leave positions unfilled because the candidates HR sent over were completely unqualified and weren't worth the effort.
I also saw a company fire almost their entire HR team of two or three dozen. The company had hired an outside consultant to review HR's efforts and the consultant correctly reported back that for the previous two years, the HR team was so bad that even their own staff had been leaving.
HR: Human Religions. And people wonder where oh where could the Messiah be? What's taking so long?
Same pattern holds with law enforcement:
376 highly trained and outfitted "Can't-DO" monkeys in Uvalde, versus one lone 22 YO Elijah at Greenwood Park Mall, who had been taught by his grandfather.
No system-savvy bureaucrats want Can-DO man to arrive on the scene, because he passively reveals who they are: worthless S-o-S. Let Can-DO man get to work, and there goes the business-as-usual dysfunction, with all of its safety, security, hierarchy, and perks. Might have to actually accomplish something useful and productive. The horror.