body shop question

You are not realizing the difference between bolt on body panels and weld in body panels. When a body shop buys a aftermarket front fender for a late model Honda they will need to egg shape some of its bolt holes, maybe drill a new hole to make it line up at the park lamp but still in an hour its on there. Lines at the door and hood plenty close enough. Quarter panels for the same car are just as close or wrong depending on your point of view. It will probably take 10 hours to get it fit proper and welded in. The key word is welded. No shifting in the bolt holes to be had.
Aftermarket quarter panels for our old cars dont fit anywhere near as close.
How many hours it will take to get it fit at the wheel well, rear light opening , etc.., is anyones guess.
During the weeks or months that your car sits in there shop its not only taking up work space where better money can be made but there is soo much work going on around your car that it will probably get a scratch or ding and that may or may not be on a quarter panel.
I hope this sheds some light on body work for you.