Have you ever watched The Gladiator? How many of them were black? They were slaves.

Do you know how many slaves were black in the Roman empire? More than had American accents I assure you.

None of them spoke English either.

What do you mean "out of context". The initial article is literally explaining that there is a misconception around the diversity of culture during the antiquity. This anecdotal event, that I picked because it was recent (sorry to disappoint you, I don't really care for Musk), was just a concrete example that the exact misconception we are talking about is real and still present today. The fact that the culprit is Musk is just "by chance".

(ps: and the fact that you end up with "and in hollywood, they depicted a roman army that was not entirely Rome-inhabitant-looking, so it is the proof that it's "wokeness" seems to also illustrate that indeed you have assimilated the misconception yourself)