"So far as I'm aware, no other camera setting will have any impact on the 'RAW' data itself."
I said that a dozen times. The only effect the camera settings have is how the editor displays it. It is a stating point, if you will, as is, "(I) did *not* tell it to de-mosaic the image. I did tell it to auto-stretch ..." You altered the Raw data for a viewable image!
All DSLR photos start out as Raw data files
When you shoot jpg, the camera converts the Raw data file into a viewable jpg image before storing it on the memory card. On the other hand, if you shoot Raw format, the camera saves the Raw data but the camera also creates a jpg image and saves it as a tag for editors like LR.