Yes, there are quite a number of exceptional model builders of the type and quality that you seem to reference, here in America. However, it is a very small percentage of the population which is capable of precision machining and design work at any functional level, and those that are so capable typically only build one-offs of any given design, which means that the pricing of such a model is far outside the ability of the average "collector" to even consider such a purchase, let alone the purchase of several different such models. There are many Americans that do wish to experience the joy of ownership and the fun of operation of such wonderful little machines, even if only those that are far from the standards of the top machinist/modelmakers. Affordable copies of lesser quality that are still functional fill a need that no dedicated precision modeler is likely to try to fill, as they are building to a level of precision that is unavailable and unaffordable to the vast majority of those who want, but do not possess the time, equipment nor ultimately the rare skills to do it themselves.
We have gone around and around on this issue a number of times, and we keep circling back to the point that those who can, will make their own regardless of what is available from other sources, but those who cannot must be glad that affordable options are available!
YMMV