A good design, is a good design. All the woodworking and craftsmanship in the world means nothing without a good design. Is it any wonder that these designs would seamlessly transfer to the mass production market with the proper attention to materials and execution? It's intellectual property; why shouldn't they profit from it?I think many boutique makers now mainly license their designs. Frankly, I like that they do since I do not have the discretionary income for a true boutique bass, but I am very happy designs by Sadowsky, MTD, Spector, and Lakland, can be had a various price points.
And in any case, those large build flows are not considered to be boutique by most consumers. The USA builds are, due to the greater number of customizations available, and the limited availability that are the result of longer build times and processes. That the lower-price, mass production market creates a revenue stream that enables these builders to focus on what they do best shouldn't bother anyone in the least. (I know I certainly don't give a rat's arse.