My experience is actually the other way around: This site lacks of non-Chinese speakers. Often I want to answer but I can't find an unanswered question. Bringing more Chinese speakers to this site may not increase its activity, since we shouldn't have any more problem with Chinese than we already have in real life. Even if we did, asking it here, on a site where English is the primary language, probably wouldn't be the first choice.
What you should really be asking about is how to bring non-Chinese speakers who's learning or interested in Chinese to this site.
I also want comment on your discussions a little bit, but this is too long to put in a comment. Whether you choose to accept perspectives as proper arguments mainly depends on what you are asking. If you want to learn the linguistics, etymology, etc., then a sourced argument is definitely better than perspectives. But if you are interested in sentences needed in daily communications, perspectives will be even better than literature. You may notice that every now and then a word/phrase/slang becomes popular, but it'll take maybe a few years before it is recorded in a dictionary. Also, if you want to tell the sentiment from a conversation (which is particularly hard for Chinese) , nine out of ten times you won't find the answer in a dictionary, and you have to consult a native speaker for their perspective. This is why you should place importance on perspectives, even if they may not be perfectly aligned with the linguitics, history, or any other serious aspect of the language. Just remember that you are talking to real people when you use it, and how the conversation goes will depend largely on their perspective.