Alas, things are not always so black and white. Obviously as a relatively responsible individual I prefer the former for myself and almost all of the people I know. But I actually don't really mind a democratically elected government 'thinking and being responsible for the actions' of violent criminals, Wall Street crooks, the Butterfly Labs CEO, and so on.
It
can be black and white. It depends on the personality and training.
I've no doubt that brain structure plays a big role in one's propensity to view things as 'black/white' or 'infinite shades.' I've observed it first hand in my own family even, and it is deeper than simple native intelligence.
But 'black/white' is a much more simple strategy and handy if one wishes to (or needs to by necessity of lower cognitive ability) avoid considering the nearly infinite tangential factors which shape most aspects of our world. Thus, it is a well represented mode of thought at such 'training' institutions as your average seminary, madrassa, Misses Institute, etc.