Feline fanatic expressed my thoughts very well. I haven't seen any quilts (in person) where the custom quilting obscured the piecing, but I have seen plenty where the sparse, meandering, or allover quilting didn't complement the piecing.
I have seen photographs on the board recently that were taken at an angle and in lighting so that the quilting showed up beautifully, but the beautiful piecing pattern wasn't easily seen. That's neither a fault of the quilting nor the photography, since the photo was obviously taken to highlight the quilting and it did so beautifully. Another photo, taken straight on, would show the piecing, but probably not the quilting. If you were to see the quilt in person, you would see both. I wonder if it was these pictures that prompted the original comment.