If God knows,why not others too?

Many people have their own privacy. Either it is at home, work , or even with our phones. But why hide our things? It all depends on what kind of things they are. For instance Winston wants to keep in private about him and Julia. Also his diary. But the biggest thing that he dont really care about is drinking. If we see that nowadays, we will think he is alcoholic person. In 1984 they want them to forget everything. "He would have been incapable of speaking" (pg. 130). Even though we cant hide our things, we cant even have our privacy by talking out our stuff.