Aliya Summary: The priest processes the offerings in the manner prescribed in this Aliya. With this the purification process is completed.
The Metzora is isolated from others during the time they are ritually unclean. That gives them time to examine themselves, their deeds and thoughts. But as part of the process of purification, as part of the process of having a second chance in the world, a kohen ( for guidance?) who becomes the first contact in the renewal procedure.