Because he wrote things specifically to please crowds of drunken peasants and moody royalty. He would not have taken something that made sense hundreds of years ago and hammered it into a new setting. Ohhh that play is still valid, but to use the exact same language......is just....silly..... Don't get me wrong, I love reading the original Shakespeare, there is some great literary uses you get only with the older English, but still....if you want to honor Shakespeare.... just make a good movie, and sell it to rich people, he'd get a kick out of that.