It's been a while since I watch that video, but I'm pretty sure he mentioned the different team working on it reason as well, and the rest of the video was only explaining the intentional differences instead of the inherent differences that comes from different people working on the translations?
Where I live, due different dialects being widely in use, it's common for TV and movies to show subtitle in the same language as the spoken language. Even then, it is not uncommon for the subtitle to deviate from what is spoken.
Also, as an English learner I used to watch TV shows with subtitles for the visually impaired, and there are times when the English subtitle deviate from what's the actors says as well.
Sometimes it's phrases that are commonly use in speech but strange to see written down; sometimes it's just tonal things that would get lost if written as-is; sometimes long speech is summarized so it doesn't' become a wall of text; sometimes it's most likely to just be mistakes.
Unless the difference actually contains significantly different meaning and can lead to misunderstanding, I don't see why that'd an issue that is worth spending the effort on eliminating?
Especially when it comes to translation, it's not like there's only one possible way of translating a sentence, who should make the editorial choice on which version is best and would that even be helpful for the purpose of disseminating information? If anything, having two version is probably better for gaging the tone and nuance in the original language.