She has it wrong. When a pattern is sold to you, you can "reproduce" the pattern, but only for your own use. If you make a quilt from that pattern, sell the quilt or enter it into a quilt show however, you need to give the designer credit, just like you would give credit to someone who quilted it, if it wasn't you, or mention all who made the quilt as a collaborative effort. If you designed a quilt pattern I'm sure you would want to get credit for the design.