The first problem I ran into with this is that it is binary; it says nothing about the middle ground. Since some research has shown a fairly high correlation in the heritability of personality and intelligence, and other studies point to the value of belief in the ability to learn and change, one needs to meld the two.
One view might be the need to recognize one's fixed abilities, while also expounding the value of developing those abilities. A second view might explore the need to find one's unexplored abilities, as well as developing them. Obviously there are other aspects to explore, but a one-or-the-other view, while useful as an intellectual exercise, is limiting.