One of the best techniques for using LLM coding is to let it write programs that frontload and automate work in a repeatable and testable manner rather than letting it only do free form turns.
Letting it generate machine code directly would be the opposite of that.
Like a JIT compiler then, where the generated Assembly depends on various parameters, where not two runs are the same, unless you manage to replicate the whole system state across them.
As for proven wrong,
"Frame was created over the past month largely via Claude Code. The Assembly code in all its glory can be found on GitHub."