Of course, the only way to know would be to hear them out, no?
My point is the answer doesn't matter. Either taking the ring leaves them a sustainable civ or it doesn't. If it doesn't it's on them for setting up a house of cards without a soft landing when they knew from the start the edifice had a glaring failure state.
If we were powerful enough that such actions wouldn't harm our primary goal we could try to engage in such and be assured that the increasing the difficulty wouldn't mean failure. As is though we're weak enough we need to focus on the approaches with the highest percentage chance of success, and opening a flow of information like this takes us away from our core strengths and leaves us fighting in an arena that doesn't suit us as much.