Really the term asian is such a sloppy designation. Technically speaking, someone born and raised in Jerusalem is just as much an asian as someone born and raised in Tokyo. I think when we say asian, we usualy mean “someone from East-Asia” or “someone whose family comes from East-Asia.” I try to avoid the term because it has a bunch of different potential meanings.
To me, the fact that Goku’s actor is white isn’t as annoying as the fact that he looks suspicously like Chris Wylde. It’s like Goku can’t save the world because he’s too busy smoking weed and not working.