We've got to be careful to not let the perfect be the enemy of the good.
I'm not an LLM enthusiast, but I think you have actually compare it against what the alternative would really be. If you give the journalist a haystack but insufficient time to manually search it properly, they're going to have to take some shortcut. And using an LLM to sort through it and verifying it actually found a needle probably better than randomly sampling documents at random or searching for keywords.
You can use Google to find you results reinforcing your belief that the earth is flat too; but we don't condemn Google as a helpful tool during research.
If you trust whatever the LLM spits out unconditionally, that's sorta on you. But they _can_ be helpful when treated as research assistants, not as oracles.
that's much easier than manually extracting the needle yourself