It's not controversial that different topics are difficult for different people, but the idea of "innate" understanding is absurd. And the idea that code quality has a direct causal relationship to code quality is even more absurd. He certainly didn't qualify that statement to imply C programmers have lousy code when they don't understand pointers, but how many people that struggle with pointers want to jump on that ship anyway?

End of the day, learning its a personal thing, and some people struggle in some topics and not in others, but under no circumstances do I think there's an innate ability to understand pointers and some people are never going to have it. That just sounds like C programmers trying to pet their ego.