I prefer to say AIs are prone to misremember things, as well as humans do. The more you read and learn, the more material you have to get confused, unfortunately.
We might want to work around the certainty with which it misremembers things. I have a very large interval of "I have no idea", or "I don't remember" and rarely caught myself misremembering things (my children are far better at that). I assume my grandchildren will eventually improve their parents' scores by a wide margin.
Everything is flawed. But if you're testing the effect of "AI advice" you need to use an AI that has a normal failure rate without tailoring the questions to alter that rate, and/or compare AI versus other sources of information that have the same failure rate.
Because they would have had to dig a little more to find trivia it gets wrong. They don't care about "which AI is the best for little facts about movies," they care about "what do people do when the AI gives them a response".