Ok genius, then why do they do it every time right after these events? And they cite these events as reasons. You're the moron. If they could do it anytime then they would not cite these events as reasons and just do it as you said yourself. You just owned yourself dipstick!
Maybe because it's a kneejerk reaction, or a legitimate reason, depending on the circumstances. In 1991, George Hennard ran his truck into a Luby's cafateria and went on a shooting spree. Soon after, every retail store in America started installing concrete pylons in front of their shops. Was the shooting a false flag so they could install millions of concrete pylons? Fuck no, they installed concrete pylons because it made sense.
Again, Do you have a job? Do you have a girlfriend? Any friends? Hobbies?