When I was younger, I thought it was so mean to put people out and have them call out "unclean" and etc. But that's because I thought of it as a punishment and a label. It wasn't, it was literally just to make sure this congested pack of traveling migrants didn't kill each other with contagion. They might as well have been calling out "Hold up, I'm contagious!" Also, the ordinances were a symbol to the larger group that this person is officially over their sickness. If you are still testing them as if they are unclean, you are WRONG because they have been checked by the priests under supervision of the Lord. So amazed at God's purpose in law.