Well, if it was a handmade quilt (not mass-produced) that is pretty horrifying, but I have to say, I make some of my quilts intending them to be used as picnic blankets or when we go camping. If I'm going to make something, I say use it and wear it out, and it will have fulfilled its purpose in life.
I helped my MIL make a quilt for my SIL who is a school librarian. SIL confessed to me, a little embarrassed, that she wasn't using it as a wall quilt as originally discussed, but put it in a comfy chair for the kids to snuggle with while reading. I laughed and told her good, I would rather it be used than hung on the wall, anyway.
But to soak up spills on a garage floor, or to cushion boulders is not use, but abuse in my book. But once a quilt is out of our hands, it's out of our hands. I try to think of it a sort of spiritual discipline, letting go and not getting too attached to material things.