No, my first kegger was a manual defrost. It rarely iced up at all. When it did, I shut off the controller, opened the freezer and let it thaw.
Remember one unassailable statistic, as explained by the late, great George Carlin: "Just think of how stupid the average person is, and then realize half of them are even stupider!"
"I would like to die on Mars, just not on impact." Elon Musk