alt Hacker NewsThis accurately boils down to "cannot reliably be binned as AI-generated". Your objection amounts to a vanishing few people who are informed that this is a test being able to do a pretty good job at it.
If 0.0005% of people who are specifically judging art as AI or not AI, in a test which presumably attracts people who would like to be able to do that thing, can do a 98% accurate job, and the average is around 60%: that isn't reliable.
If that doesn't work for you, I encourage you to take the test. Obviously since you've read the article there are some spoilers, but there's still plenty of chances to get it right or wrong. I think you'll discover that you, too, cannot do this reliably. Let us know what happens.
I can't do it reliably and I don't want to - I learnt to spot certain popular video compression artifacts in my youth, and that has not enhanced my life. But any distinction that random people taking a casual internet survey get right 60% of the time is absolutely one that you can make reliably if you put in the effort. Look at something like chicken sexing.