Think of the Greek language. I teach NT Greek, and have translated it. However, don't ask me to translate Classical Greek for you. I recognize quite a few words of it, but am not fluent in it. The grammar and vocabulary changed drastically over the 800 or more years between Homer's Greek and the NT. I've tried to read that, Xenophon's Anabasis and other documents. Can't do it.
Take Septuagint Greek. It is supposed to be koine, but I have a hard time reading it. The vocabulary is quite different from NT Greek. Then there is modern Greek. It has lost a couple of tenses, etc. I recognize some words, but can't really read it. Languages change and grow, but they never become "degraded." That's a myth.
I'm fluent in modern colloquial Japanese, but there is a classical version. Until after WW2, all Japanese written documents were in classical Japanese, including the first complete Bible. But I can read it. How?
I studied it! Is it inferior or superior to modern colloquial Japanese? Superior? Of course not!
Languages communicate differently. That goes along with any language, including 17th century English as compared to 21st century English--two different dialects, if you will, of the English language. Interestingly enough, Japanese have a terrible time learning English because the grammars are so different, but Chinese syntax (sentence structure) is very close to English, so Chinese learn English more easily. Chinese has no articles, so that part of English is tough for them, but they can speak it. None of these 3 languages are better then the others. Nor are Hebrew, Greek, Latin, whatever.
Now, I'm just wondering how much Anthony knows about languages and linguistics. So far I've not seen evidence that he is a genuine linguist. I hope he'll answer this and put my fears to rest.
P. S. When I write about languages and translation, especially the Greek, please don't think I'm bragging. It's what I do for a living. You'll never read me saying, "I'm good at languages." But if I asked, "What do you do for a living?" and you said, "I'm a plumber," I'd expect you to be able to answer my plumbing questions, right?