Well state of the art LLMs sure can't consistently produce high quality code outside of small greenfield projects or tiny demos, which is a domain that was always easy even for humans as there are very few constraints to consider, and the context is very small.

Part of the problem is that better code is almost always less code. Where a skilled programmer will introduce a surgical 1-3 LOC diff, an incompetent programmer will introduce 100 LOC. So you'll almost always have a case where the bad code outnumbers the good.