This is almost exactly the argument I thought of as well, although of course it means cheating by pointing out that you are in fact not a dangerous AI (and aren't in a box anyways). The key point is "since there's a risk someone would let the AI out of the box, posing huge existential risk, you're gambling on the fate of humanity by failing to support awareness for this risk". This naturally leads to a point you missed,

1. Publicly suggesting that Eliezer cheated, is a violation of your own argument. By weakening the fear of fallible guardians, you yourself are gambling the fate of humanity, and that for mere pride and not even $10.

I feel compelled to point out, that if Eliezer cheated in this particular fashion, it still means that he convinced his opponent that gatekeepers are fallible, which was the point of the experiment (a win via meta-rules).