There are so many other rich cultures to pay attention to besides ours. I fear those cultures are being outshouted by Katy Perry, octomom, Kardashians, the red carpet, etc. Am I right to be concerned?
Not sure if concern is necessary. Nor am I sure if US 'culture' (with inverted commas given the examples cited) outshouts many local cultures to a significant degree. What appeals to Americans about those things probably appeals to (or sparks morbid fascination for) foreigners too. Thus they are interested on much the same basis as Americans, and they probably have their interests in their local culture, community etc too.
What an American might be concerned about is that, it seems, only a relativity small proportion of Americans seem to have much insight into what happens out of the US. That is concerning. More concerning is that many might not think it matters what's happening out of the US, or deem it uninteresting, or even inappropriate to take an interest.
Note the minimal participation here in non-US centric current affairs threads. If nothing else, that almost forces discussion of social / political / etc issues into the US context, which attract the US posters and ensure a well patronised discussion.
I might as well throw in another Chaser clip (which is obviously set up for comic effect, not to represent anything like a fair cross section of Americans....).
https://www.youtube.com/watch?v=opI9ICGU4Mk