Because you are doing something you love, so it's not work. In fact last night I spent about 2 hours pressing the half-square triangles that I had sewn for the family reunion quilt that has to be done before the end of the month. I try not to iron clothes if I can help it. Ironing fabric is relaxing to me, as I can get the ironing board out, turn on a show on TV or a moving and before I know it, the stack of fabric is done, plus everything is one piece, no sleeves, no tucks, etc.