While things like this don't disrupt the functioning of most of the people in the government, it definitely has a fairly significant impact on the mental state

While things like this don't disrupt the functioning of most of the people in the government, it definitely has a fairly significant impact on the mental state of the senior leadership of many organizations. Having your public website defaced and on the news puts you in the spotlight. It also pushes senior leadership, who generally dont understand what it means, into thinking that actual operational systems could just as easily be destroyed or messed with ("what else could they do"). Don't underestimate the importance and impact of a technical PSYOP against non-technical folks. If nothing else, I bet it provided a 1-2 hour distraction from 'work' for the senior leadership involved.