That doesn't necessarily imply that chat logs are not valuable for creating AGI.
You can think of LLMs as devices to trigger humans to process input with their meat brains and produce machine-readable output. The fact that the input was LLM-generated isn't necessarily a problem; clearly it is effective for the purpose of prodding humans to respond. You're training on the human outputs, not the LLM inputs. (Well, more likely on the edge from LLM input to human output, but close enough.)
You can think of LLMs as devices to trigger humans to process input with their meat brains and produce machine-readable output. The fact that the input was LLM-generated isn't necessarily a problem; clearly it is effective for the purpose of prodding humans to respond. You're training on the human outputs, not the LLM inputs. (Well, more likely on the edge from LLM input to human output, but close enough.)