> I fail to see what's good about your approach.
It was pretty clear in that the primary motivation was to eliminate candidates who either lack confidence or competence so that you can spend more quality time with those candidates who care more about the respective skills.
I don't know you, but I am guessing from your highly defensive tone that you likely fall into one of the categories I described in the previous paragraph. If this means of candidate elimination is emotionally offensive you should ask yourself why. When candidates exceed the number of openings somebody must be eliminated.