"I'm not really worried about the Chinese government having my stuff. What are they going to do with it? They have no jurisdiction over me. I'm much more worried about the US government tracking me."
"Ugh, you think the government is trying to track everything on you? Conspiracy theorist much?"
It's also perfectly legal for the defense attorney to do, if I remember right from my legal issues classes. Lawyers can use illegally-obtained evidence only if it was not illegally obtained by the government. If the cops break into a house illegally and find evidence of a crime? That can't be used. Some weird guy does that? It can be used.
(Of course, this is all in theory. In practice, it's way different.)
Wouldn't they have to somehow establish the evidence was legitimate then? Like, if some guy broke into a house to get a murder weapon that has finger prints that aren't the defendant you'd need to somehow show it wasn't tampered with? Although obviously China can sidestep this because they were acquiring all the data uninterrupted anyway, it's like sharing a constantly running camera.