To an extent, I do understand what your daughter is saying...but it only applies if A) you're going into debt and/or not paying bills because you're spending on quilting supplies, and/or B)you can't walk in your house because of the quilts/stash/machines/etc. everywhere and/or C) You're not eating, sleeping or participating in life's many other activities and joys
If money is an issue, I'm certain you'd find many people who would buy your quilts - you can fund your "habit" ;) buy posting them for sale on craigslist or something like it. Who knows, you might just find yourself in business!
If only space is the issue, you can donate to a worthy cause (there are SO MANY!).