I think the main use for something like this is that it is shaped to the exact dimensions of the trap so that you can bed it in securely with less work. Digging the hole isn't what takes time in setting a trap it is the bedding and packing it tightly in the hole where it is stable and doesn't move if an animal steps on the jaw instead of the pan at first. So with that said, a pipe would only make a round hole and wouldn't work the way these are designed to work.