Why Facebook is the west's closest approximation of WeChat's ubiquity

From the article - "The ability to amplify the individual’s intent through digital proxies depends on aptly capturing...experience in the physical world" The Self, The self in private contexts and the self in public contexts.

While i agree WeChat does a better job of this. I have to wonder if part of this is cultural. Just look at how much backlash Facebook has seen over the last year - and widespread skepticism about its trustworthiness especially when it comes to privacy. Is WeChat always going to be more ubiquitous because its users trust it more than Facebook's users will?