It was already a well-known review point way before LLM's. Every book about code cleanliness has some point about "write WHY not WHAT when commenting code". It's a point everyone makes, because it's such an ubiquitous thing.

Of course the standard bad example is

    // add 1 to a
    a++;

While an IMHO good example would be when normally you wouldn't expect this addition, so you'd comment

    // the flipDinkleWooptie method doesn't add one in this case
    // because there is no wooptie register, so we manually
    // add one here.
    a++;