The born-again man or woman is not motivated by this world-system.
Think of being on the farm. It is a very hot summer day. Nearby in the barn lot there is a big mud wallow.
Here comes a pig. He grunts with contentment as he wades into the slime. You say, "Mr. Hog, why do you want to wallow and submerge in that filth? Why do you not seek a cleaner environment?"
That pig has not the slightest interest in your ideas for his betterment. He loves the mud.