I think "idea" is getting overloaded here. The article isn't talking about new feature/product/tool ideas, but about what concepts to use to build those features. e.g. what data structures and algorithms to use.
So your last line agrees with the article, I think. They are saying that it's still important to curate ideas, and no longer important to read the code; the time you would have spent reading the code should be spent curating ideas.
So your last line agrees with the article, I think. They are saying that it's still important to curate ideas, and no longer important to read the code; the time you would have spent reading the code should be spent curating ideas.