We are talking about different things - the Universe having a purpose, and making your life have a purpose.
An atheist believes his or her life can have a purpose, while the universe does not have a purpose.
Since one's life is not identical to "the universe", it is possible for one's life to have purpose, but not ones universe.
Well, as I said, it would be the same thing in case one's life was the only one. Because if there is only one human in the universe, if the universe has no purpose then the purpose of the human is the only purpose in the whole universe. So it's rather identical to it being the purpose of the universe.
But with 7 billion souls in the world, it's another story...
Ha! I didn't think of that particular edge case
