A lot of that is because Russia and China don't feel very secure compared to the US for various historical/geopolitical reasons. The US govt is known to act ruthlessly when it feels there's an existential threat.
Think about the fact that the FBI had to actually get a warrant to even begin talking to Lavabit. They had to actually go through bureaucracy. It was not instantly handed over to them on request.
We ban such accounts that do these things, so would you please read https://news.ycombinator.com/newsguidelines.html and stop?