The quilt magazines today seem to "push" quilts that are made from collections. I suppose they get subsidies from the fabric manufacturers to survive. Making a quilt from a collection of fabrics is not traditional; this is a new phenomenon. If you look at quilt magazines from even 10 years ago, you will see that all the quilts are made from fabrics selected by the individual quilt maker from whatever was on the market at the time.
I've been quilting off and on for 20+ years, and I've never made a quilt solely from a manufacturer's collection of fabrics.