That is simply wrong. How can people like that look at themselves in the mirror?
I've made a few quilts that I had trouble giving away because I liked the finished quilt so much. To me, that means that the gift to the recipient is greater, so eventually I manage to part with them.
While I could imagine keeping one of the ones I made with my own fabric, batting and backing, I can never imagine taking a quilt that someone else made for a donation to the needy. To me that is stealing, and I would never be able to justify it.