How? Do you mean in their core features (chat related), or all the extra stuff the bundle in the app (payments, apps, etc.)?
WeChat has basically everything built in. Messenger has been trying to copy features from them, to no adaptability avail. Watch the video of Zuckerberg saying how they need to catch up to Chinese messaging apps.
This is not a bias, this was my experience. I hope conditions are better where you work. It's very sad to see people away from their families that much just to save face.
No, what you're talking about is stereotype. You have one experience and apply it to everyone.
Imagine if you said that about black people: "black people tend to..." It's unacceptable in polite society, if you're socially aware