> I wish that each such generative AI service came with a brief but conspicuous warning explaining that these systems can sometimes produce output that is factually incorrect, misleading or incomplete.

Guess what?

Books in the library can be wrong, even peer-reviewed encyclopedias.

Pages on the internet can be wrong, even Wikipedia.

When accuracy is important, you must look at multiple sources. I think AI will get better at providing accurate information, but only a fool relies on a single information source for critical decisions.