Why would you care about architecture? Ability to implement the current feature, ability to implement future features, maintainability, and (at least sometimes) performance.

But why would you care when an AI can just rewrite it? Yes, but can it rewrite it to a good architecture? Or just to a different one?

Does a good architecture make code easier for an AI to maintain? I don't know, but I think it's at least not proven that it doesn't.