It is more important to make maximize utility (the most happiness for the most Steem holders) than it is to promote paying minnows. Bloggers have the role of producing content. Bloggers produce content because it makes the consumers of content happy. The Steem Power holders are the funders and their happiness is critical.

And you are right, if most Steem Power holders are Chinese then absolutely there is the possibility that posts in Chinese produce more marginal utility, and this is fine in my opinion even though I can't write in Chinese. It's better for Steem.