Primarily because you can’t build up until you’ve torn down-
“I will most assuredly give you the words you are to speak for me. Know for certain that I hereby give you the authority to announce to nations and kingdoms that they will be uprooted and torn down, destroyed and demolished, rebuilt and firmly planted.” Jer 1:10
Uprooting and tearing down, destroying and demolishing- all that has to take place before anything can be rebuilt or established. Let the one who has ears, hear.