I think there is a funny bit of mental gymnastics that goes on here sometimes, definitely. LLM skeptics (which I'm not saying the Pangram folks are in particular) would say: "LLMs are unreliable and therefore useless, it's producing slop at great cost to the environment and other people." But if a study comes out that confirms their biases and uses an LLM in the process, or if they themselves use an LLM to identify -- or in many cases just validate their preconceived notion -- that something was drafted using an LLM, then all the sudden things are above board.
