Templates and templating languages are still a thing. Source generators are a thing. Languages that support macros exist. Metaprogramming is always an option. Systems that write systems…

If these AIs are so smart, why the giant LOCs?

Sure, it’s cheaper today than yesterday to write out boilerplate, but programming is about eliminating boilerplate and using more powerful abstractions. It’s easy to save time doing lots of repetitive nonsense, stopping the nonsense should be the point.