Suppose you have a specialist to watch over your devices; that does not mean your entire activity must be on hold. Those that offer computer help can do their job without interfering in your activity. They do not have to turn your devices off, as many of their operations can be done outside of working hours; the entire network must be restarted for some reason. Even if this is the case, that will not happen for more than a couple of minutes, as these people are very well trained and know how to do their job without interfering with yours.