Yup, hence the “unfit” analogy. It doesn’t correspond well with LLMs getting more intelligent in the same way, which I believe, is intended by having a “self editing agent”.
In the linked project, the LLM edits its prompt. I think this is similar enough to humans improving our capabilities through ideas (such as language) that it counters the complete dismissal LLMs improving themselves as if it violated the laws of thermodynamics.