The Devs need a much needed thanks!

[Silverbane]

B. It's common for fan translations to misinterpret information being said, so saying that is the fans do a better job is not really much of an argument.

Professional translators can do this too, especially regarding subjects having extensive jargon associated with them.
This is another reason that letting the volunteer amateurs do the real-time translation: SE's not responsible for their mistakes. The subsequent professional translation can be checked and corrected by the devs before its release.

[N.B. I actually have to deal with this problem in my profession. I handle the "English-to-English translation" (among other revisions) of a lot of jargon-heavy documents that were professionally translated into English from a foreign language.]