Kurotonbi no Seija - Vol. 3 Ch. 14 - The Demon King's plan, The Goddess' knowledge, and my power

[eldachii]

I wish the story stopped jumping between 'saint', 'healer' and 'priest'
I get his job is a saint but others keep on saying the other 2 names and I don't think like they have a strong, separate meaning in this story
Not to mention of he is a saint why do they keep calling him the other things

 

[Yuu338]

Are most mangas just a glorified ads for LN?