And this explains the entire reason why the government's systems are so easily hacked. If you're Joe Six Pack automated protection will usually be good enough to secure your network. If you're the highest profile target in the world your only chance at defending yourself is an elite team of security professionals.
They aren't being attacked by code. There aren't any 1s and 0s on a mission to break into their systems. They are being targeted by hackers - in other words people. No computer, no cluster of supercomputers, can effectively strategize against expert human hackers any more than a giant armored wall can defend against a human army. In both cases people will just go around it.
If you want to defend yourself against people you have to have people of your own. Otherwise you've lost before the first attack comes in.