They are not indeed, just sharing my anecdata that the best ones I have come across happen to know much more about the details. I am sure one can find good and

They are not indeed, just sharing my anecdata that the best ones I have come across happen to know much more about the details. I am sure one can find good and efficient devs that know very little about the underlying system and are very capable of using the available abstractions and frameworks. I just happen to find the first group better.