Older devs are not letting the AI do everything for them. Assuming they're like me, the planning is mostly done by a human, while the coding is largely done by the AI, but in small sections with the human giving specific instructions.
Then there's debugging, which I don't really trust the AI to do very well. Too many times I've seen it miss the real problem, then try to rewrite large sections of the code unnecessarily. I do most of the debugging myself, with some assistance from the AI.