Hollywood has forced the myth of a lone hero or a small band of heroes taking on the big bad guys and winning down our throats for decades.
The Lone Ranger, John Wayne, Dirty Harry, Arnie, Mad Max, Die Hard, Tank Girl, Every WW2 war film... the list goes on and on.
Even the most motivated, heavily armed lone wolf is just a spree killer when all is said and done. The long arm of the law might get to them before they get that far.
What has worked throughout history? Mass collective action. It doesn't work every time but it does work.