I'm not sure the notion I keep seeing of "it's ok, we still architect, it just writes the code"(paraphrased) sits well with me. I've not tested it with architecting a full system, but assuming it isn't good at it today... it's only a matter of time. Then what is our use?
Others have already partially answered this, but here’s my 20 cents. Software development really is similar to architecture. The end result is an infrastructure of unique modules with different type of connectors (roads, grid, or APIs). Until now in SW dev the grunt work was done mostly by the same people who did the planning, decided on the type of connectors, etc. Real estate architects also use a bunch of software…
Architecture is fine for big, complex projects. Having everything planned out before keeps cost down, and ensures customer will not come with late changes. But if cost are expected to be low, and there's no customer, architecture is overkill. It's like making a movie without following the script line by line (watch Godard in Novelle Vague), or building it by yourself or by a non-architect. 2x faster, 10x cheaper. You immediately see an inflexible overarchitectured project.
You can do fine by restricting the agent with proper docs, proper tests and linters.