Ultimately though, nearly all actual selection processes are are subjective or ilegible... depending on how you see these things. How an interviewer feels about you intuitively matters a lot, maybe the most. Actual tests of skill are usually intuitive as well. An interviewer tries to gauge your skills, but it's rarely designed to be an objective test of skill. If it is an objective test of skill, it's rarely the primary decision driver.
Blind auditions enforce a certain kind of objectivity. But, I think we can read into the fact that musicians "audition" while employees "interview." You perform an audition.
Blind auditions would be a radical change to hiring/selection. The big advantages/disadvantages of the approach are like those of standardised testing. They measure the easily measurable, and bury everything else.