I have wondered about this also. For me, quilting is my creative outlet. I like to take the time to choose fabrics and patterns, think good thoughts while I am cutting and piecing by machine. Each of my quilts is a labor of love. I am trying to learn fmq through craftsy, but just can't get it. It is my goal to become proficient and comfortable with it, and then purchase a mid arm to do my own quilts. So i send my out to a long armer, but even doing that, I can do 2 or 3 quilts a year at the most.
I have done a dozen donation quilts in one year, all the same pattern and machine tied off. I loved it at the beginning as each was was different, but it actually began to be a chore, and was hard for me to think good thoughts as I assembly line sewed them together. Hand top quilting takes me years, as I do it a bit at a time.