Everything that can be done with LLMs is better than without. Why use tooling at all when you just can use a LLM? Maybe just make the LLM generate machine code for your tager directly.
Just like making digital systems that are "better" than analog ones from the past because of digital.
The fact that you have chosen to say this about generated amd64 assembly is telling. This is a terribly pointless exercise. Further, the llms are bad at more niche languages especially. Even experimenting with having them write C, which is quite a bit more common than writing straight assembly, I have seen them fall over quite severely.