I generally agree, but there is some research on autonomous agents which interact with LLMs and could become more relevant for blockchains. For example, there's a capability called Autonomous Replication and Adaptation (ARA). It consists in the ability of an AI to launch other instances to perform sub-tasks to reach a goal. Current models like GPT-4 and its direct successors are far away from that capability, but this may change in 5-10 years. At first of course, the ARA-capable system would have to be instructed by a human.
That's interesting, I haven't had the liberty of time to take a look at it yet. Seems to be a less explored area of AI as of now, but possibly will change in the far future.
As it stands, I think AI has to overcome the barrier and we have to develop Agentic AI agents before that could become remotely a possibility. I think OpenAI's Operator is remotely similar to it, but I find it too different and lacking to be considered agentic. Any models having the ability to achieve artificial general intelligence would be good for a start.
I think all possible blockchains are in some way variations of existing models. Even DAGs take elements of blockchains. And thus I think AIs indeed could design blockchains, as they have access to a lot of literature about consensus.
In hindsight, I guess that wasn't the best phrasing. I meant that AIs are generally unable to reason in that level of intelligence yet, and it'll probably be a stretch to say that they can design chains of their own, because anyone can readily do so.