A CTO has so many things under him, which are not coding... There are architecture decision, in the company where I work, also HW, for example. He cannot excel

A CTO has so many things under him, which are not coding... There are architecture decision, in the company where I work, also HW, for example. He cannot excel at every technical interview in the company. Of course has to be technical, hast to have a huge background in development, and been in many of the areas he will oversee... but you cannot ask him to excel at every one.