Sure, You don't have to grind your weed. Just like you don't have to put premium gas in an Italian sports car. In both scenarios you want to maximize your investment and get it to perform at peak capacity. By grinding your weed you'll experience a more controlled burn that's tastier and smells better.
Increased aroma and taste; Grinding herb helps release the full smell and taste of cannabis
Tighter packed bowls; Promotes better air-flow and a smoother hit
Controlled and easier burn; Reduces the consumption of lighter butane and improves the consistency of your hit