Culture clash and culture gurus?

I'm often amused by the simplistic and funny things these 'gurus' of culture and 'trends' say. As if it's some kind of exact science, or that populations, groups and societies are homogeneous - 'the japanese' like cutsie gizmos, 'the australians' like more 'conservative, reliable lifestyle fitting products' ...

I had better get rid of my hello Kitty underwear and buy some dark blue socks.