Boeing engineering has allowed design hazards to exist for want of a single washer to lead to puncture of the fuel tank. Ironically it was the fix that caused multiple fuel leaks. Without the input of more intuitive minds there will be more 'unexpected' disasters'.
Being on the predictive side of the intuitive fence I have seen the prejudice against my side first hand. Elon Musk has gone a long way to correct this with great success.