Humans can also make mistakes. This is the first test I apply every time. Could it be that AI is actually more capable than a human? If industry decides than humans are more reliable, they will choose to use humans. Reliability is part of cost-effectiveness, and it's built in to the business decision process.
A human would only make up an answer like the ones in the article if it were a compulsive liar. A human would ideally say "I don't know" or at worst employ the "I'll confirm that and circle back" corpspeak evasion.