Roads connect different destinations in physical world. Every road user (vehicle or any kind, pedestrian or live objects) has to comply with the usage rule for safety.
Network connects different hosts or systems as cyber world. Similarly, there are also rules that every user (device, human) must follow to become cyber safe.
Even if you are using the information processing facility without any network connection, say a totally isolated computer, you also need to bear the same in mind. This is because it is a usage habit such that you adopt consistently. Like driving habit, you apply the same attitude no matter for work or for leisure.