Our textbooks and resources are either imported directly from Great Britain (most) or written by local authors
I've seen those books, they're horrible and not about Britain at all (except very obliquely) students can get high grades on matura without knowing much of anything about real life in Britain* (much less the US).
Of course not.
I think that would be an improvement - let those who need to communicate with Belgians or Egyptians or Malaysians do so without burdening them with a bunch of culture stuff they don't need - while allowing those who are interested in culture and history to devote themselves to that.
*I don't know anything about real life in Britain but some Brits have told me that they're more or less science fiction...