I have notice that a lot of landscape photographers are using tripods when they shoot. What's the point of this? Tripods add a lot of weight to your backpack. When hiking or climbing up high mountains, I strain myself with 2 lenses, a light body, the necessary food, medical, and other supplies. Unless doing a long exposure, I don't see how a straighter horizon (which could be easily done in PP) is worth carrying that much metal. Can someone fill me in? Am I missing something?