The purpose of testing is to give you data on things you cannot prove through technical analysis. But in a risk tolerant culture you will just identify issues

The purpose of testing is to give you data on things you cannot prove through technical analysis. But in a risk tolerant culture you will just identify issues that you should already know about. That installing gyro's upside down is a bad idea, or that rubber o rings fail at low temperature. Having a rocket explode is a very expensive way of getting that data, and lead to program delays. The inherent danger of space flight is the reason you have to be rigourous. It is the only way it can possibly be made to work at all. Because people will make stupid mistakes, and the rocket will explode.