Reality: Higher education is scrutinized more and more as it moves into the competitive marketplace. Therefore, rubrics must also be recognized for it practical and institutional values. It validates the the grading procedure.
Years back when I was a college student and and started my college teaching career...my knowledge and my ability as a teacher formed my rubrics. The change is the key point, but the rubrics do not handcuff the instructor, but serve as a guide independent of his or her subjective assessment.