Today it would be impossible to shut down the internet or restrict any serious part of it as our whole infrastructure and monetary system is based on networking capabilities.
As you said about infrastructure. In my views there is no life without internet. If there is no internet how people would serve. So how people will know about the world that what's going on even you may know that without internet we are nothing. If you want to visit any country you get there picture first then visit. So this is poor step by government