This is pretty much exactly what I was going to write.
Plus, I have cats and dogs that live inside, and even though they're not allowed in my sewing room, fur drifts. And I often glue-baste, so there's another reason to wash.
This, too. I have seen people visibly relax when I tell them that not only is the quilt machine-washable & dryable, it's ALREADY been through a wash and dry. If I'm giving a baby quilt, I wash on HOT and tell them I did so so they'll know it's safe to do the same if the baby has an accident on it. (Normally I wash on warm.) I want people to view my quilts as something that's designed to be USED daily. I also tell people it comes with a lifetime warranty (my lifetime) for any rips or holes or failed seams. I haven't been quilting very long yet but I HOPE some day I'll get back some tattered quilts that need new binding and backing and some patching done. I HOPE they get loved and used that much!