That works great for you. What happens when my objective is to develop a solution that requires 100s of developers, spans multiple years, costs billions, and has major liability concerns?
My recommendation would be to hire people who are smart, responsible, and passionate. The language or framework can be taught. That's what the FAA does. Their initial assessment exam determines cognitive aptitude--not textbook knowledge. And air traffic controllers from all backgrounds are responsible for billions of dollars worth of aircraft and the lives of hundreds of thousands of people every single day.