Uh really
Can they be that ignorant? YES they can,
What they should say is, "we like production work" The means in the insurance industry cookie cutter smash and grab with insurance repairs.
You might ask them if you deliver the car rolling and free of all parts that need to be removed for painting as this is their big time hard to calculate part of the process. You also tell them you will put back it back together freeing them and you from them loosing parts breaking them in the process...
Body shops are REALLY good at loosing parts and better at breaking them during removal especially the really expensive can't find parts.
In my stomping grounds there are cottage "below the radar hobby restorers" that skirt the AQMD enviro nazis et al and do nice work. I am sure there is some one in your local area, go to the donuts and coffee or other drive in event and ask around.