This gives you more control of the image. Pointing your lens at a building often means pointing the lens up to get in the whole building. With a 4x5, using a lens that projects an image much larger than the 4x5 space the film takes up, one can straighten the back to keep the building straight and move the front or rear standard to place the image on the ground glass so the whole building is in the frame. This correction is used to keep the architectural perspective correct. It is used with the proverbial cactus flowers and red sandstone cliffs to exaggerate the relationship by pointing the camera down a bit and then straightening the back so it is all in focus and the flowers loom larger in the view.
Image manipulation is only one aspect of LF cameras.
Individual exposure and development control of sheets of film is a major reason many use 4x5 and larger cameras. Adjust the exposure and mark the film for push processing. If you have done some basic testing you will already know how much to apply. If not, take your chrome film and rate it double the indicated speed and tell the lab to push one stop. One sheet at a time rather than a whole roll of film sacrificed for one or two shots.