If you ever listen to news in US, you will know the reason why it is true and it is not a media myth.
Half of the time, they talk about weather, not of their country, but of their own city or at best, the state. US doesn't play any international team sport except during the olympics.
Moreover, in today's times of "opinion" news, they are misinformed even about domestic news. Try ever listening to Fox News and you will know what I am talking about. If you are not in US or don't have cable, search on youtube and you will find a ton of "news" from Faux News.