As has been pointed out so many times on this thread, there is absolutely no reason why an Asian pilot can't perform a reasonably easy visual to a large airport in good weather. It is a question of training, exposure, and repeated practice.
If fault may be found, then it certainly lies with the training departments of the various carriers who have been having problems at SFO. Off with their heads I say, get some seasoned IP pilots with solid experience in there, do away with the political appointments, the favoritism, nepotism even, that drives the dismal selection process to these positions.