Would the vastness of space be a reality, without someone or something to observe it? Would there be a point to the existence of said universe, without observers? If so, then aren't we the creators of our own universe?
Just like when we aren't dreaming, there is no one to sense the surrounding. No one can see, feel, hear, smell or listen to the dream we make up. Does it still exist then? I don't think so. I think the same can be said for our universe.