can you draw a pretzel though? Like, if I handed you a pad and pen and said just draw one from memory?

If you look at proper drawing instruction books from the 1940s, they show you all of the 3D rendering techniques later adopted by our modern CGI pipelines. To draw a head, you follow a pattern: draw a cube, carve it up into parts of the head and neck, carve that up into eyes, nose, ears, etc, establish a 3-point lighting system, and render materials. It is very time-intensive and analytical, and required if you didn't shoot a reference photo back then. This is needed for folks who can't visualize, like myself.

Yes, of course. I was a visual artist for a decade before falling down the software hole.