I'm somewhat at a loss as to where you are headed with this.?
Yes is the answer to your recent question. I'm not sure that it says it was "written for the people to understand" as in simple language, which I think you are indicating. If that is the case then the scripture sentence, " Study to shew thyself approved unto God, a workman that needeth not to be ashamed, rightly dividing the word of truth." doesn't have as much meaning as I thought it did. In other words, if it was simple language many wouldn't need to "study" it much, not much need to be ashamed for not studying since it was simple, and "rightly dividing" would be a waste of ink.
I guess I'm not understanding why it is a problem to write or talk in code?

I will say this, you are on the right track with "arcane".