AI code generation has something important in common with 3D printed houses. Both optimize the easy part.

3D printed houses can only manage the underlying structure of the house. It doesn't cover finishing work which is much harder on the nerves and pocketbook.

Likewise, AI code generation is only useful for the actual implementation. That's maybe 20% of the work. Coordination with stakeholders, architecture, etc are much harder on the nerves and pocketbook.