To be honest, if you're white skin color has largely been a boon for you, but if you're not white, issues of skin color can still affect your life outcomes in ways that many white people may not understand, nor do they wish to because IMO they are afraid that it will result in merely blaming white people for everything.
That may be part of it. But I think a bigger part of it is that, if you tell people that being white is a "boon," you diminish their accomplishments in life, and their sense of themselves.
When you say something like that, it's very easy to sound like you're saying that, "you've only accomplished what you have in life because you're a member of the in-group and have an unfair advantage," and, "if you had to compete on a level playing field with people of colour, you never would have gotten where you are today."
That may not be what you mean, but given the fact that deprivation is relative, and that most people have to work pretty hard to get anywhere in life, regardless of their race, class, or gender, that's a sure-fire way to make people defensive, hostile, and unreceptive to your message.
I'll be honest--I skipped over much of this thread. But I just wanted to say that, as a fan of crime shows like
Homicide,
The Wire, and
Oz, I really notice the relative absence of good roles for black actors when I watch sci-fi shows. Even
The Shield had CCH Pounder as Detective Wims, and Forest Whitaker as a guest star in the fifth season.
So, in that respect, a lot of what the OP said struck me as rather obvious. Anyone who thinks that televised sci-fi has been doing a good job of representing the racial and cultural diversity of North-American society should really try comparing sci-fi to other genres.
I'm just not sure
why that's the case, though I doubt that there's anything malicious behind it.