It's not cartoonish, it's the culture. Of course it's not homogenous - you can find a lot of people that go against the mainstream. In a hyper-macho culture you can find males who are shy and sensitive, in an introverted culture valuing privacy and closeness you can find people who are extroverted and exuberant, in a culture where accepting blame is not encouraged you can find a lot of people that will readily do that. When you describe the culture as if it were a single person, it will necessarily get a little cartoonish because we are reducing millions of people to one description. But I think this description matches the dominating culture quite well - though you of course always need to realize not everybody follows it to the same degree, and some people would eagerly defy it.