The main reason we lag so far behind is that most of us don't have a "Let's do something prone to failure and find out if it will actually work!" mentality. In general we pay too much attention to thoughts and too little to feelings when it comes to business ventures. Add to that a dash of extreme risk avoidance and you've got the perfect recept for a very weak startup culture. Of course, the ones who are the opposite of that get struck down relentlessly by the collective mentality.
These wacko interviewing processes are just another symptom of this. Don't think any comptetent business leader actually believe these scores matter at all. In the end it's just another safeguard against (gasp!) taking a risk.