Why does it make sense for Cisco then? China is certainly a law enforcement agency, with just as much right to require it as the US does under CALEA (local US law).
Completely depends on the abilities of the military which enforce the rule.
Violence tends to be the way nations define rules outside their own borders.
Inside their own borders as well. States are creatures of violence. They are created by violence and require continuous violence to remain in existence.
"lawful intercept access" is the name of the feature, in that sentence.