"I've seen bad code in the past" does not address the fact that human code by an experienced software developer is almost always less complex and more clear, with less repetition, dead code paths, and odd architectural choices than what an llm generates. If you don't recognize this, then you either haven't been reading the code or are not an experienced software developer. 80% success on a benchmark means they fail 20% of the time in the exact domain they were trained on.