Just as with most anything, you are paying not just for what you get, you pay for 'how' you get it!
I could do brain surgery, and it would be cheap, but I doubt anyone would be happy with the results. I wouldn't use the hospital room, my folding knife would do the trick, and are you ok with used shoelaces for the stitches?
The equipment, training, and quality supplies are all included in the price. You'd also not be happy if you handed me 20 totally different quilts and I quilted them all the same. I am constantly taking classes, on line and in person, to increase my skills, learn new tricks, and in general learn to 'talk' to a quilt and learn to 'listen' to what it's saying it wants done.
I want to take a quilt top and make it be the best it can be, within the budget of the piecer. My best days are when there are hugs and tears involved when I deliver a quilt. Having been on that side, I know what it's like to get a quilt top back and have it translated into a treasure.