If there is something unjust about the culture, our immediate response is often to seek awareness for the issue. While this is an important step, it must immediately be followed by some form of action, else the awareness may make it socially unacceptable to talk about and, ironically, further entrench the ill.
Making it socially unacceptable to use the N word does not fix racism.
In fact, the focus on words may have further entrenched racism because the most hateful of speech was simply driven into the shadows where it could fester and grow. Meanwhile, the rest of us thought we had made progress.