You can't help but ask yourself "why?" Why is this book included in the Christian Bible? Why are a bunch of arcane rules and requirements included in the foundational book of a belief system that emphasizes faith over works?
I think it's because a ...perfect God cannot tolerate imperfection. And yet, because we have the power to choose, we can choose unwisely. Leviticus describes perfection, at least in terms of man's ritualistic compensation for sin. But Christians believe that Jesus is the only way we can achieve true perfection. His sacrifice made us perfect in God's eyes, once and for all.
We claim God's perfection through faith in Jesus. Nothing more, nothing less.
makes perfect sense.