It's so you don't have to have the checklist to the side memorized.
If you're a web developer working with wordpress you'll have to move the files around somehow, it's something every developer has to learn and its a rite of passage, but to be frank even when at full speed the entire process takes a good 15-20 minutes that require me to pay attention.
So it's all scripted now, and its totally generic. It can be used on any wordpress version and works if you're just moving the files around in your server or if you're FTPing the files to somewhere else in the world.