From a coding perspective, proper technical systems already have checks and balances (e.g. test cases) to catch bad code, and is something that's important to have regardless of generative AI usage.
From a creative/informational perspective, there are stories every day of hallucinations and the tech companies are correctly dunked on because of it. That's more product management error than AI error.
AI hallucination isn't a showstopper issue, it just has to be worked around.