I see and understand your point, but maybe the reasoning behind these requirements are that first and foremost, this is an English forum, and as is often stated by Admin and mods, all posts should be in English, with an English translation provided.
If, as your post hints at, you are proficient in English, then posting in English initially and then posting in your native language shouldn't be too difficult.
It would certainly be of benefit to more people if you could, as I doubt many could translate from Chinese to English.
Just my thoughts, but Tom will be able to clarify for certain.