When it comes to television and TV shows it usually just comes down to how much you take it seriously and who exactly is watching it. I think the freedom of speech and such protects people from being told no on certain subjects, and even if the NITV was a form of propaganda it would be fine.
It would be absurd to believe that National Indigenous Television is a form of propaganda against non-indigenous people and governments. Following the logic that thinks that it is would make you have to presume that Country Music Television is a form of propaganda against people from the suburbs and inner cities. National Indigenous Television is just a station that is largely for people who wants more information and entertainment on Indigenous people and nothing more.