You shouldn't assume nationality.
It is a valid issue from an American perspective because content is there, but people would rather ignore it, and complain about not having any English content, than to consume existing content and show that there is a demand for it.
The shows are on Netflix. The movies hit the big screen every month at the local AMC.
But so few people watch them. Even fewer talk about them.
Hollywood shows are big because they are consumed globally. If everyone who complained about the lack of shows with Asian actors would consume even a fraction of the existing content (and there is good content), we would see more of it.
That doesn't excuse the CBS situation, but it is frustrating as part of the larger context as people (sadly) are voting with their dollars.