I replied that we can already build nonagents.

It remains the case that if you think they could be dangerous, you need to explain how.

I still have little idea what you mean by nonagent. It's a black box, that may have some recognizable features from the outside, but doesn't tell you how to build it.

Again, we already know how to build them, in that we have them.

Worse than that. MIRI can't actually build anything they propose. It's just that some MIRI people have a reflex habit of complaining that anything outside of MIRI land is too vague.