Google's process consists essentially of 2 meetings - phone screen, and onsites. You don't get engaged to someone after the second or third date. It's not about hours spent, it's also about hours spent reflecting on the relationship.
So right here is the mysterious reason why perfectly qualified people don't get hired at Google - they didn't spend hours reflecting on the relationship!!!
I realize you're trying to mock me, but you've totally failed because that's exactly my point. If your interview process consisted of a 6 month work trial period for every single candidate (and assuming no candidates dropped out), you would pretty much be able to detect nearly every single qualified person. Of course, this is not feasible in practice, so we settle for interviews.
