The hardest thing about acting is getting your attention off of the meaning of the words in the script. In real life, you talk and you don't worry about the words you choose, they just sort of come to you and jump out your mouth. This all seems to go out the window the moment there's a script involved. Suddenly everyone is worried about memorizing the words and the acting gets either wooden or becomes indicating, or "penguin acting," which involves flapping your hands around while your arms barely move. Yuck.
So, what we are doing is working with scripts that are essentially meaningless. By doing this you'll learn to de-couple the words of the script from your acting. The result is that your work will become more natural and creative, and far less amateurish.