> Also if that's all someone of his caliber needed to determine applicant quality, I don't see why everyone else feels the need to go through all this other bullshit.

Flipping it around, it takes someone of that caliber to be able to determine applicant quality with just that. Can we replicate it without having to spend some of your most valuable employee-hours, let alone in a way that doesn't leave you open to accusations of all sorts of bias?