To address this controversy more specifically:
There seemingly being fewer minority voice actors to portray their minority is an industry problem, but no single company should be vilified or criticized simply because they used a white voice actor to play a minority. Context matters. Was the minority character always supposed to be a minority character? Does the studio have a good relationship or even a contract with a talented voice actor they feel capable of capturing the performance? Do they want the voice actor to voice multiple different races/characters?
Basically, if the voice acting in the finished product sounds insensitive, like a caricature, then we can call into question the casting choice. But if a British person plays an American, should we get upset? If a female plays a teenage boy, should we start threads about it? They are essentially the same thing.
Again, I'll repeat: there being an industry wide issue of minority voice actors is an issue. Frankly, at least in America, there is a general issue of minority representation in a lot of fields be it art, industry, etc. It is a problem unfortunately. But we shouldn't question every artist, every business without context and without responsibility.