I can see what you're saying here, but doing a real inlay on the drum would've made it incredibly expensive...and the country was in the middle of the Great Depression when this drum was made. People didn't have money to spend on things like drums. Most of them hardly had money to spend on things like food. So, I don't think Ludwig was cutting corners. Paper decorative inlays were a very common thing, and it's impressive that they even put them on at all. Personally, I think they were just trying to produce a drum that they could afford to make and that people could afford to buy.
If they were worried about what people could afford, they wouldn't have put it on at all.
A decal designed to look like an inlay is deception, pure and simple. Not saying this isn't a nice drum - just saying L&L was clearly attempting to create an impression that wasn't authentic.