True. But we still have to remember that sometimes art work is just artwork. In the past I've seen many people just take any old picture and assumed that it was a historical representation of something. Humans have been telling stories, creating music, and drawing art for entertainment. People back then also had imagination as well and enjoyed creating things that were beautiful or things that were scary. Unfortunately sometimes people in general forget that. Some of it was just entertainment, a story warning kids about certain dangers. Or just a story for enjoyment because everyone likes a good story.
When I see this image, I don't see a historical reference on how to shoot an arrow. To me it looks like an image that one would use to tell a story You have kids, you have the animal in the sky, You have the archer that seems to be turning around to shoot backwards.
To prove my point, I actually looked up some more information about this picture.
So here's the reality about the picture show. It's based on a legend called Tiangou, a demon dog that lives in the sky. And what we are seeing is Zhang Xian, the god of birth, the protector of male children and a master bow-man.
So now that you know more information about what you are looking at, the picture makes sense as art for entertainment.
Historical Art tends to look dry in comparison, almost like manual. They don't capture the eye the same way. During a time where most people probably couldn't read or write, I'm sure there were tons of drawings everywhere by non artists which is why some of the drawings look really bad.
When ever I see historical drawings or paintings, I always remind myself that it could just be art. Then from there I try to learn more about what I'm looking at.