I think this is a very interesting question to consider as well. I think everyone has made some good points about it too.
In studying screw tip horns with Art DeCamp, Art provided an excellent overview of the history and production method for these pieces. We tend to view them as beautiful, professionally-made pieces that were a cut above the standard homespun horn. In fact, it seems from Art's accounts that these things were made by the thousands in a total "factory production" environment. I don't think they took much time to consider the artistic side of what they were making. They had "X" amount of tip and base plug patterns, they carved, turned, and assembled them as quickly as possible, and put them on the market. While they are certainly nicer than a home-whittled piece, I am not sure they were really perceived much that way then, other than the fact that they were "purchased."
I am probably wrong, but it is just a thought from my perspective. Dr. Tim, your observations are very well taken. Thanks for bringing it up.
Jeff