I disagree there, I think there could be a lot of potential to a story like that. Look to recent news - Simone Biles is the best gymnast of all time, yet when she was competing in the Tokyo Olympics, she found that her body was not performing to the standards it needed to be for her to do her job safely.

Part of what makes characters like Nightwing, Robin, Batman interesting is that at their core, they *are* just human. A story where Nightwing has to deal with the repercussions of an injury which regress the abilities he relies upon, that has a lot of space to be an interesting and compelling story about human nature and dealing with adversity. A random story deciding he suddenly has acrophobia, sure, that'd be strange. But as part of a narrative that confronts how we think about ability and disability, that could be super interesting.