Do people here not realise that "second opinions" are a thing because humans disagree with each other when presented with the same case all the time? It's not just an LLM thing!
Why should a radiologist have to debunk AI slop? They have enough to do already. That's the same mentality that is frustrating open-source repositories with sloppy pull requests, and saying "here, sort this out for me".
Depending on the disease, even in cancer there's myeloma which may cause bone metastasis in many parts of the body with very focal lesions. Radiologists can't assess each and an every one of them, or even to find them all. So AI can definitely help in these scenarios.