Why do we have to read about leprosy in the Bible? Leviticus 13-15

IF you are still reading through the Bible on this reading program today would be a big temptation to skip, delay or even stop the reading. It is tough to understand the need to read this section which is primarily about leprosy. Why does God include this in his Word? Especially for New Testament believers? Why does God tell us that His word (all of His Word is implied) is profitable for doctrine, reproof, correction and instruction in righteousness (2 Timothy 3:16) and then puts this section before us in Leviticus? If we had to deal with leprosy every day in our society it would make some sense to read about it. However, in our society today, leprosy is almost non-existent. So, why read it and what lessons can we learn for the modern-day-starbucks-driven-soccer-playing-believer? Perhaps the main lesson is listed in the verse we just read in Paul's letter to Pastor Timothy. Perhaps we are only to know that "all scripture" is profitable. Perhaps we should quit second guessing it and just read God's Word by faith and allow it to do what it does in the hands of the Spirit. But, we are not so inclined, so what other lesson could be here for us. God gives us some insight as to the purpose in the last instructions about leprosy in chapter 15. We read there that God wanted them to keep clean of spreading disease and aliment because He wanted to keep His temple/tabernacle pure. The lesson shown to us is that God is concerned about our health and how that health relates to our worship. We of course know that we can worship in poor health but that doesn't mean God isn't concerned about it. We are to cleanse our self from unhealthy living and spreading unhealthiness is not in God's will. We are to keep our bodies healthy as we worship Him. A healthy body doesn't mean I am righteous but a righteous body works on being healthy in worship for Him.