Even the most talented mortal was not as capable as a god when it came to talent. Even if there were mortals capable of killing gods, they were not more talented than gods in a direct comparison; it was only when the difference in status between them was taken into account that the true difference in talent became clear.
An ordinary divine talent was superior to that of a peak mortal, yet that ordinary divine talent would not even be capable of accomplishing anything while remaining at the divine level. It was practically like a football championship: a mediocre player from the top leagues was infinitely superior to one from the secondary leagues, but within his own league he was nothing, and when a talent from the secondary league rose up, he would be completely overshadowed.
