A paradox is a seemingly self-contradictory statement.
What is paradoxical here? The goal of "representation" is not explicitly stated. It is therefore not possible to detect any self-contradictory aspect, since there is no point at which an explicit goal is contradicted.
Example: Suppose the goal of "representation" was to provide role models for those in the minority. Any supposed under-representation of the majority is thus brushed aside. The majority has role models. Thus any prejudicial discrimination is purported to be acceptable because it is a minority that is being helped, and the majority is only being slightly harmed, if at all. The issues of ethics and morality of the pro-minority discriminatory actions are thus sidestepped.
Example: Suppose the goal of "representation" were explicitly racist. Suppose those proposing it explicitly believed that the minority group was a superior race. Again, there is nothing paradoxical in such an attempt. These attitudes and actions are judged on the basis of their racism, rather than on questions of internal logic of their programs. Their goals are not self contradictory, since they do not want the majority to be represented in any sense fairly. They explicitly want to shut out the majority as much as possible. It's immoral but not self contradictory.
It is only if we presume that there is a right to be proportionally represented, and that anything else is not ethical or not moral. And that the various societal authorities have the right, responsibility, and mandate to make such adjustments, only in such cases do contradictions arise. But they arise long before minority representation in the media.
For example, they arise when we consider such issues as the demographics of people work as garbage collectors, roofers, coal miners, etc. All of the dirty, dangerous, unpleasant jobs that typically go to the less considered portions of society. We can see that quite clearly when we ask where the programs are to induce the minority to take jobs picking up trash by the highway. After all, if proportional representation is a moral good, if non-proportionality is not moral, then it is clearly equally not moral for people who read the news as it is for people who operate septic tank cleaning services.