Well we don't use AI now, so most code is written by humans. CI/CD can be hard but it's not actually harder than anything else overall. If you think it's hard for an ordinary software project, I'd bet it's either not your field of expertise, or you're dealing with a system that was probably set up by inexperienced people.

When AI gets good enough to really displace programmers, it probably won't require as much supervision as it does today. It might feel more like the AI is prompting you instead of the other way around... But idk, it remains to be seen just how good it will actually get.