If you have a large PR the existence of a good summary on "what" changed can help you to make a better review. But I agree with you, when reading PR descriptio

If you have a large PR the existence of a good summary on "what" changed can help you to make a better review. But I agree with you, when reading PR descriptions and code comments I want a "why" not a "what". And that is why I think most LLM-generated documentation is bad.