Very fascinating. Substance meaning can change depending on linguistics. For ancient thought, it's best to know the true original language.

I will call the guy who gives a full theoretical analysis of this song, Mr. X.

Well, I wonder where Mr. X got all his analysis from first of all. Is it his interpretation? Or what is his source for the meaning of the song?

Is it therefore objectively true to the artist's intent or is it merely a (good) explanation that seeks to provoke thought?

I don't know how accurate this claim is as I have not yet dived deeply into ancient knowledge and compare it to modern interpretations of it, but I do feel like this hits a nail... Either Mr. X does or the artists.

It is quite logical that it is difficult to interpret ancient wisdom as wisdom often assumes the student or reader is familiar with common knowledge... However, what was common in ancient times might be rare currently, or even forgotten or used in different ways, making it very difficult to interpret and parse such texts without a high degree of mastery of background knowledge.

It's even harder for certain ancient times where everything was rooted in oral tradition without writing. People back then could've been generally wise, but without texts to refer to as primary sources it is virtually impossible to make sense of it.