Why might an external disease prevent someone from wanting to commit a crime?
Was the goal of Tzaraat to humiliate someone into not wanting to transgress, or was it just an illness that renders you unclean?
How would isolation (quarantine if you will) affect the punishment? Is it sparing the person from further embarrassment or just drawing more attention to their situation?
In this case, Tzaraat was given as a punishment. Does that also apply to the Tzaraat we see in Tazria?
Does Tzaraat fit into the categories above? Should it be seen as a punishment because of these pesukim?
This is another example of public punishment whose goal is to discourage someone to sin against Hashem or against one's fellow. In your opinion, is lashes or Tzaraat a worse punishment? (You might think the answer is be obvious, but think about how someone in either of these cases might feel. Also you are seen as ritually impure and have to isolate when you have Tzaraat. The same does not go for lashes.)
Being ritually impure says a lot about Tzaraat, and how we can relate it to our own lives. When someone is affected by the disease, they are ritually impure. When someone has done something wrong, they feel that way. They feel guilty. We can see the isolation time away from everybody and everything as a time for reflection. How can you be better? Taking the time to ask yourself this can help you improve in the future and might have been what Hashem was trying to accomplish here. This is something to think about next time we do something wrong or offend somebody. We can take time to contemplate about what we did and how we can make amends.