My point is that these people didn't (necessarily) do something wrong. The only reason they had to think they were doing something wrong is that the rules say they're doing something wrong.
If a professor provided the questions and answers for flash cards to be made, is that functionally different from the students getting such information from a third-party? It's "cheating" from a rules-based definition but I don't see how a person is necessarily not learning from that.
Is there any other kind of cheating?
The ostensible reason to be against cheating is that it devalues the degrees the university gives out if it can't be trusted that a person earned said degree through merit. I'm saying that a person who found the exam and learned from that material isn't going against this reason to be against cheating; they did, in fact, pass the exam on their own merit. At least, I don't see why I should consider it differently.
Although it's very funny that this happened on an ethics course, the "is it ethical to cheat on an exam if you learned the material" question doesn't even apply here imo
I don't see this so clearly. It seems to me that this is assumed. Why do you think it is so clear that this is what the students did?
In this case, they cannot even appeal to that perennial cheater's excuse: "what matters is being able to get the right answer, not how I got it." Here, they demonstrated utter incompetence at that task! Their knowledge was so impoverished that they could not even identify blatant errors.
Cheating is rampant in general and a lot of people bend over backwards to rationalize it.
In short, they were given numerous valid resources and chose chose not to use them. Then they went completely outside the class and used unverified information in place of learning the material.
Assuming it wasn't an "open internet" test, then there is nothing wrong with this.
Out of all those people studying all those wrong answers author doesn't mention a single one of them bringing it up during office hours. I'm assuming they didn't. They all thought they were getting away with something and had an edge over actually studying. They were wrong.