I do not believe the universe is tailored for humans. We have existed for a very, very low amount of time in this universe's history, and very soon, conditions will have changed, and we will likely not exist, and if we do persist to exist (like after the sun goes out), we wil exist in a drastically altered form.
I also do not accept the notion of a food chain with some species higher than another. A mountain lion might eat a deer, but without enough deer, the mountain lions may go extinct, which will affect other balances in the ecosystem. Nature is an interconnected web of life, and what affects one species will affect all species in some way, distantly or not. With our particular kind of human intelligence, we have subjugated and dominated other species and the environment itself, which could very rapidly bring on not only the extinction of the human race, but most or all of life on Earth. How could we possibly be on the top of some food chain? The notion just seems ridiculous to me.