Perhaps they chipped in because GPs phrase "Assuming the US" is not a very clear way of saying they want to talk specifically and exclusively about the US, or t

Perhaps they chipped in because GPs phrase "Assuming the US" is not a very clear way of saying they want to talk specifically and exclusively about the US, or they thought it fair to broaden the discussion? I don't see how your sweeping generalisation in the last paragraph adds to the considered discussion here either.