Why does anything need to change? This is another in a long line of ineffective terrorist attacks, and if anything strengthens the case for keeping on as usual

Why does anything need to change? This is another in a long line of ineffective terrorist attacks, and if anything strengthens the case for keeping on as usual (if you want to argue that security at the best targets is already so good that people are resorting to random dumpsters). No one died and as far as I can tell no one even has serious injuries.