Bugga, I thought the same way you do until I got my Silhouette
I love mixing my die cuts with my stamping (and I am one of those who does love to cut out stamped images) it's so great if I need an image or shape to be able to get it instantly. For instance I made a Halloween card the other day, tons of stamps, toad, broom, witches hat etc. but I didn't have a cauldron and I really "needed"
it for what I was trying to do so I was able to quickly and easily die cut one.
I do get what you're saying though, they aren't a necessity for every papercrafter.