> evaluate whether the generated code solves it correctly, consider security implications, ensure it integrates properly with existing systems, and maintain it as requirements evolve

I think you are basing your reasoning on the current generation of models. But if future generation will be able to do everything you've listed above, what work will be there left for developers? I'm not saying that we will ever get such models, just that when they appear, they will actually displace developers and not create more jobs for them. The business problem will be specified by business people, and even if they get it wrong it won't matter because iteration will be quick and cheap.

> What is your rebuttal to this argument leading to the idea that developers do need to fear for their job security?

The entire argument is based on assumption that models won't get better and will never be able to do things you've listed! But once they become capable of these things - what work will be there for developers?