Most games in Japan are catered towards what the Japanese want to see, so you don't exactly see a lot of white or black people in those games and, when you do, their stereotypes are greatly exaggerated (huge eyes on white people, for instance). Am I offended by that? No. That is their market and they do what makes sense.
Here are demographic breakdowns of the United States:
*These numbers may not be exact, but we can update after the 2020 census*
1.2% Native American
If a game is catered towards the American/European Market, then it makes sense for it to often, if not the majority of the time, have white main characters. People need to stop being so offended. This is simply capitalism at work.