Because Chapbooks and Broadsides are quick and inexpensive to produce, they are a great medium for experimentation & personal expression. And unlike blogs (which are also quick and inexpensive to produce), you can hold them in your hand, caress them, read them on an airplane, hand them out to random strangers on street corners, take them in the bathtub, sleep with them under your pillow, scent them with perfume, and let your cat or dog chew them into little bits.
So why letterpress? In this post-industrial age of plastic and virtual realities, we all crave the pleasures of the tactile/the real. What is more satisfying to touch and to look at than a gorgeous inked impression on a zaftig sheet of paper? You know this to be true, what are you waiting for?