"Top of the line is a perception, using one is reality"
I share this view along with the mass rebuilder quality noted earlier. I believe you are looking through the eyes of a smaller volume shop where less volume and less cash flow mandates flexibility because quality control is limited to one or two employees. I'm curious what volume these shops that use the millers do.
As an example - I have a small horse farm. I own a modern compact tractor. It can do 95% of everything a larger one can and was 1/2 the initial cost. But that cost has a cost of it's own: While it can do everything I need it to and just as well as a larger machine, it can't do it as well in as short of a time as they can. My time has less cash value and the quality of the end product is entirely mine. I can take 1/2 a day to mow my open spaces neatly with only 27hp and a 48" bushhog. So a smaller, less powerful, more manual tractor is fine. So my standard of perfection is reached. The for-profit larger dairy farm down the road has a dfferent standard when they have to cut their fields.