“Cite your sources” requires a level of trust that most people haven’t earned with me. If I do go to the work of citing widely known facts, I had better not get a knee-jerk rejection when I come back with points.

I’ve cited sources when I got similar requests. I’ve sometimes crafted detailed responses detailing them point by point. And I’ve been burned again and again. Unless I already trust you, or you have made a good argument refuting the claims as a better and more complete version, I don’t feel obligated to do as you say.

People who demand evidence for things they already know to be true are usually arguing in bad faith. Would you demand somebody send you a peer reviewed study proving that not everyone likes chocolate chip cookies?