Building on that, how long did the AI take to draft the 77 news articles? Now ask a human to draft 77 articles in that same amount of time and see how many errors there are...
Not OP, and I don't think it directly indicates how smart you are, but it does show you are at or above some smartness threshold (i.e. smart enough to get the answer).
If you don't get the answer, you might still be above that smartness threshold, but didn't get it for some other reason (didn't have time to study, didn't sleep enough the night before, interview anxiety, etc.).
I think their point is that anecdotes are not very valuable and then gave examples of anecdotes that differ as a way to show that individual experiences / perceptions can be vastly different, which isn't at odds with their original point.