I understand it as “write SVG, say when you are done and only then you are allowed to see the rendered result”. Multiple shots would be either “you get more than one try, we'll pick the best” or “you can see the rendered result and iterate” (or maybe that would be “model + harness with tools”?)

What doesn’t make sense? They aren’t drawing it by hand, they are still using SVG. Give them one chance before rendering it.