On CT repair cost being lower, I can totally see that. The images from the factory show very simple panels, 1-2 bends, and holes for mounting. I would not be surprised if a quarter panel took ~2 hrs to replace, no prepping or paint, and the materials maybe $500. In fact, I bet it's ripe for the DIY crowd, extreme case only $100 for some local sheet metal, lol.
Our Model Y rear hatch replace and paint was $10K+. The hatch was $2K. It was the prep and paint that made up most of the cost. So if body repairs don't at least half with CT, or more, I'll be surprised.