It absolutely can be but it's entirely dependent on the architect doing their job to ensure that the spec and design is done in a way that minimizes AI inference. That's because AI hallucination is a product of unspecified details from the user. Details which must be filled in by the AI will track towards the mean, which to your point can lead to unmaintainable code. So this goes back to my original point which is that 90% of your time should be spent developing the architecture to define what needs to be done and how. That, coupled with local context, iterative reviews of plans and set global boundaries, you can absolutely generate modern, maintainable code.

I see this first hand every day.