If I am CEO of my company, and my name is Greg, what tells you more about my nature?
The argument isn't that the ''title'', is not broad in some sense, or indicating that it means the 'same thing', as jesus. The argument relates to putting a persona , a 'name', to the title, that infers something, besides a very broad usage title.
ie, you can't say that it is a 'broad general title', and also say that 'Lucifer', means 'this persona', /specific character/, at the same time.
Logically, we might not even know 'who' you're referring to.
/If you write ''Lucifer'', and it is a 'broad title', then it could mean different personas, Jesus being one
/If you write 'Lucifer', with the intent to mean someone specific, /'not Jesus', in this example, then you are not only being vague, //We don't know which ''Lucifer'', you're talking about,, but you are also not using the title in a ''broad'' sense, anymore. /Hence now a character specific 'name'.