sounds good, but often there is no clear cut "best person for the job". if you go through, say 30 resumes and find say 6 people that would all be good hires. how do you narrow that down to 1? after the interview and all that, you might still have to choose between a few people.
at that point, getting some diversity in the work place is good. insted of hiring the guy who graduated from your college.
or as Chris Rock once said:
"i dont think i should get a job over some other guy who scored better on a test. but if there is a tie...... F*CK THEM. they had a 400 year head start."