Cause we got a lottttt of things that destroy things around us, for example, natural disasters. Lets say there's a tornado or tsunami, of course that's going to destroy a lot of things including, houses, stores, work places, etc. If I have the power of creation (to create things fast) then I would be able to create buildings and resupply everything that was destroyed.
Of course there's pros and cons to having the power of creation and destruction
