Possibly a deeper form of this question is whether everything happens for a reason, or due to a Reason. In other words, does everything have causation, even if it is simply chaos or randomness, or is there some sort of Plan divised by some “intelligence,” whether God, the god of your choice, alien intelligences, etc. My own belief is that it requires more blind faith to believe this incredibly complex Universe is the result of randomness than the result of a Plan. There is an old gnostic theory that if you were able to grasp the reason for everything, then you would become God. I find it comforting to believe there is a Reason for everything, even those things that appear random and chaotic, and I don’t need to know, nor am I able to comprehend, even my small part of it, much less the whole shebang.
So if your question is does everything have causation, I’d say that is close to self-evident, but if your question is whether it is part of some Great Plan, I’d say that is a matter of faith, and I believe everything is part of that Plan, even though in my human arrogance I’d like to believe that I am the center of the universe.