You don't get the point. In many times, it is much faster to write code itself rather than adding comment to explain it. Adding comment to define precise behavior is not that simple. If you see lots of comments, that code is very unusual. Take a look at serious open source project like linux kernel and android. If you pick up any non trivial code from those and try to define comments to explain what the code is doing, it will take way more efforts. If it is taking more time, why would any serious sw project do that?

It is still far away. Most serious codes require a very complex description to explain what it is and usually such a description in human language is more complex than the generated code itself. So it is not efficient to use human language to dictate an ai agent to generate code.