> if they are correct I see no issue at all.

Indeed. Are you verifying that they are correct, or are you glancing at the output and seeing something that seems plausible enough and then not really scrutinizing? Because the latter is how LLMs often propagate errors: through humans choosing to trust the fancy predictive text engine, abdicating their own responsibility in the process.

As a consumer of an API, I would much rather have static types and nothing else than incorrect LLM-generated prosaic documentation.