Controlling land use is very important because at the current rate of evolution and development we need measures in order to moderate the growth of societal structures. I believe that having such measures can help us avoid over-expansion of society and damaging certain land that can have crucial natural resources.
Yes, controlling land use is important, because cities are more enjoyable when they are planned. It would be frustrating to buy a home, only to have its value disappear when someone puts in a factory next door. Controlling land use protects natural resources, but also makes a community more enjoyable, because people know how to plan and what to expect.