As a non-American, I endorse the argument myself.
The US has a quite particular culture, and yet most of its population (from all my experience) seems to consider it either (a) the pinnacle of human culture that others countries should/do aspire, or (b) the natural state of civilization (what things just "are", with everything else being inconceivable).
Add to that the geopolitical force and might of the country, and the fact that its companies control most of the internet infrastructure, and it gets troubling that a country with very specific interests that it pursuits globally, and where Janet Jackson showing some tit was considered a major cultural "thing" the media and people wrote about for weeks, gets to decide such policies.
>* there is no culture that could run a centralized global social network without these sorts of problems becoming ever-larger, the only difference is where the flash points would be.*
Well, the EU for one has a much broader range of cultures within nation member states, and a much broader cultural and historical and geopolitical perspective.