That's like saying that there's zero reason to ever ask an LLM to do basic math for you. Sure you probably shouldn't do that but sometimes it's convenient and so people will inevitably do exactly that regardless of the somewhat frequent wrong answers that are guaranteed to ensue.
How specific are the citations? If it's “Sentence 4 on page 97 supports” or “Paper says ‘___’” then I imagine it would be fairly easy. If it's “(__ page long) paper supports x”, then very difficult?