This is not just an English language press issue. Coverage in the French and German press of Indian and Chinese issues that I've had some familiarity with over the last 20 years or so has often been very disappointing. Indeed, when I lived in the US, the French language reporting of US events that I was present at taking pictures wasn't very grounded or accurate either.
Migeru quite liked my formulation, so I'll repeat it again, one of the biggest issues is "Our Foreign Correspondent syndrome."
b) How does this fit into the general prejudices of my readers? (e.g. French reporters in the US will analyse every gun crime by reference to American barbarity, wild-west individualism, insert cliche here.)
c) How does this fit into the prejudices of my boss? (e.g. any London Times reporter has to take the words from their friend at Le Monde and add several layers of neo-liberal spin and some anti-Europe, anti-EU message. That's what working for Murdoch means.)
It's worth noting that both (b) and (c) can be done internally by the reporter, but also by the editors back at the copy desk in the home country.
Not every foreign correspondent behaves this way, but by far the majority do.
I will point out though that the average level of general culture is not the same in the US as it is in the parts of Europe I know well (admittedly I know little to nothing of the UK), and this contributes to an accentuation of the process you are describing when talking about a journalist from America, which perpetuates the insularity like an eternal return loop.
The making of Thomas Friedman as a national authority on foreign affairs really demostrates this lack of general culture - it reaches high up the socio-economic scale, and is certainly not limited to the Bidochon segments of the population. It permeates the middle-brow and reaches into the high-brow as well. Only the caliber of the words used by the journalist or the commentator actually changes.
There is really no way I could even conceive of such a mediocre man rising to national prominence, on the basis of such a flimsy and limited understanding of the rest of the world, elsewhere in the so-called West. Nil aon leigheas ar an ngra ach posadh