I think Nyotarules is of the school of (which I am also part of) that the intent does not need to be racist for the result to be racist. The intent was the tell a story about a human woman who adopted the hairstyle of her Vulcan saviors. This, on its own, is not a problematic or racist when we're trying to tell a story sci-fi story about a human girl in an alien situation. But, when you cast a black woman as that character, it brings up a whole new set of connotations and meaning that wasn't intended, but the result is this: a TV show asked a black woman to not have a black woman's natural hair, during a time in (real world) history that the very subject is touchy. They could have easily not done this, and her entire story would have been 100% exactly the same.
If anything, SMG made a point to say that in the interview for the purpose of quelling anger about it in the first place, much like how in interviews after Culber's death were quick to say they didn't bury any gays. She may even have brought up the point, but was satisfied with the rationalization. I doubt anyone on production intended to do something racist, but thats the problem with pervasive racism...it exists and happens without you even realizing it.