I'm glad you wrote this comment because I completely agree with it. I don't think that there is not a need for software engineers to deeply consider architecture; who can fully understand the truly critical systems that exist at most software companies; who can help dream up the harness capabilities to make these agents work better.
I just am describing what I'm doing now, and what I'm seeing at the leading edge of using these tools. It's a different approach - but I think it'll become the most common way of producing software.