It is not a "fake problem"; it is a problem that has cost at least thousands of dollars in damage in one instance that we know about.
LLMs are new, and people don't understand their limitations yet.
Plus, we're trained from birth to interpret plausible-sounding text as likely correct and true. LLMs generate plausible-sounding text without regard for truth. So now we can either fix the LLM models or become much more critical readers/listeners. Unfortunately I don't see either happening anytime soon.
And like there is something OpenAI could do that wouldn't involve stopping cutting and pasting on every internet enabled device in the world?
There are a bunch of real problems to deal with, OpenAI should not spend a minute on this nothing problem.
This is like saying encyclopedias should stop kids from copying entries as their own work.