Sounds like a smokescreen to me. All file sharing services have this problem. The solution is to respond to subpoena requests and let the government do their jobs. They do not have to allow themselves to arbitrarily violate their users privacy in order to do that.
Problems with this app go beyond just privacy and bleed into national security.
You as a citizen of your country have an obligation to not freely offer yourself up as an attack vector for cybercriminals all so you could fry your brain with garbage media.