It doesn't mean that at all.
Well, depending on what you mean. It could just be that your premise is known to be false.
But, to me, it would be absurd to suggest that the air traffic controllers should be “diverse” in the sense that a “minority” group should be represented in excess of its representation in the overall population, that there aren’t enough black people the US for a fair hiring process to achieve this, and that therefore an unfair process should be used to increase this sort of “diversity”. That’s all kinds of wrong!
No, this is false. You don't appear to know what you're trying to postulate.
There are enough differences in socialization, current population education levels, current incarceration rates/history in the population, etc. to make that essentially impossible yes?
As to if they are fair or not? Probably not. are you going to fix it, and if so, how?
We can argue about theoretical from birth path differences all we want, but no one on the hiring side has the time to deal with those or to control them - and if looking at things from a coarse population level - it just doesn’t reflect actual reality right now, yes?
Now that's proof that white hiring managers are incompetent! (that's a joke)
The US population is around 1/8 black. Which means, if every kid has an equal opportunity (in an absolute sense or on average) to develop the requisite skills to be an air traffic controller and if every kid was equally inclined to apply, and the application process were fair, then eventually around 1/8 of air traffic controllers would be black. Which seems like a good outcome.
If 1/8 of the population is black and someone is trying to get 1/4 of air traffic controllers to be black, that seems like a mistake.