Honor for the Kohen

וְיָצָא הַכֹּהֵן אֶל מִ חוּץ לַמַּחֲנֶה וְרָ אָה הַכֹּהֵן וְהִנֵּה נִרְ פָּא וגו' מִ ן הַצָּרוּעַ (יד, ג)

And the kohen goes out to outside the camp... And, behold, the nega of tzora’as has healed from the afflicted person. (14:3)

Sefer Sifsei Kohen explains why the Kohen Gadol has to personally go out of the camp to see the metzorah by saying that this man was sent out of civilization and everyone knows that he is a metzorah, which is a cause of great embarrassment for him. Now that he received his punishment and did teshuva, Hashem wants to grant him some honor to offset his shame. When the Kohen Gadol set out, people certainly saw him walking and accompanied him. Thus, everyone found out that the man had done teshuva and was healed, which was a big honor for him.