2 candidates identical in every way, except one has a 75% average and one has a 97% average. Which do you choose?
Now you have 300 candidates CVs on your desk. Of these 300 you need to select 6 for interview. What methods would you use? Hours, currency, age etc etc. All quantative factors. Agreed qualitative factors are also important and become increasingly important as you progress through the selection process, but to get a job first of all you need an interview.
Just my €0.02.