Destroying the Universe 101:

Purpose needs us because existence has no purpose; only people do. Although people are a part of existence, so in a way the universe does have purpose. However, only certain parts of it do and it's really more of a chance alignment of the stars than anything. The point is that the reason we struggle so much to find meaning in the universe is because there is none. We just pretend there is, and there's nothing wrong with that. We have to pretend; it's simply impossible not to.