Well the article does really only focus on terrorism. Safer or saferty can be a rather broad term.
For that matter, what about "natural" disasters and disturbances. They pose an eternal threat to safety and well being. Tornadoes, wild fires, hurricanes, earthquakes, floods, and other phenomena can mess up our lives just as thoroughly as any insidious terrorist inspired plot.
We tend to react rather than proact to all of these events as well.
Well the whole point of the article is about the money and effort expended as a result of 9/11, so yes the article does focus on terrorism.
We would probably all agree that not enough effort/money is put into preparation for more common everyday disasters such as wildfires, hurricanes, earthquakes, or just getting lost in the woods. After all that is what draws many of us to ETS.
However, it is worth noting that many of the preparations for terrorist attacks also help us prepare for more ordinary calamities. For example, the article mentions how a terrorist inspired mass casualty exercise helped Boston hospitals prepare for what happened during the Boston Marathon bombings. The lessons learned from that mass casualty exercise would also help in case of any other (non terrorist) mass casualty event such as an earthquake or accidental explosion due to a train wreck.
For me the point is that while we have made some progress, in some areas we are still have a long way to go. While some money has been well spent, a lot has been wasted. Let's focus on what we can improve, and try to avoid mistakes of the past.