I agree completely, but by 1915, Einstein had reshaped himself into exactly the multidisciplinary person required to write the general theory. The real tragedy

I agree completely, but by 1915, Einstein had reshaped himself into exactly the multidisciplinary person required to write the general theory. The real tragedy in science are those with only physical intuition and little mathematical foundation, like Nicola Tesla, who wasted much time on notions that flatly contradicted the mathematical underpinnings of physical theory.