I don’t feel like off-the-cuff summaries by AI can replace web sites and detailed articles written by knowledgeable humans

No. But that’s not what a typical search result returns.

There’s also no guarantee the “detailed articles” you get back are well-informed or correct. Lots of top search results are just ad copy or similar propaganda. YouTube, in particular, is rife with long winded bullshitters.

What you’re looking for is a well-edited trustworthy encyclopedia, not a search engine.