Sacrosanct
Legend
Strangely, I don't have this issue at all. Must be a personal thing.
I can sort of see how people might assume that in the early days, when the game was centered around the middle ages in Europe, and most gamers were white, so that's what was reflective. However, I don't see how that assumption has been true since the mid 80s or so, when supplements like Oriental Adventures, Al Qadim, etc have been out. Humans in D&D are very much all real ethnic races today. And in the last 20 years, there has definitely been a push to make the artwork more racially diverse. So anyone in today's game who assumes human with white, I think that's more with them and their personal assumptions, than anything the game has done.