TL

“How come it is that when lotsa people are confronted with arguments they cannot reply to with their own salvos, they call in an airstrike from C.S. Lewis?”

Perhaps, they just don’t want to actually THINK about it. The danger is that we might have a point and then someone might have to adjust their belief system somewhat.

FWIW I’ve adjusted my belief system many times as I learn more about God and His Word.