Anyone who even uses the term “fairness” - let alone falling for the so-called argument is an imbecile. The very word is subjective, and is being used manipulately. Just like “nice” and “good” and a host of other words that can mean whatever anyone wants them to mean, which is, “what I say is fair, nice, good, how I define it.”
Those words, and that device, are especially pernicious because they are used to suppress dissent - because if you disagree with the person touting fairness, etc, you are ipso facto unfair, not nice, and bad.
This is kindergarten reasoning, and the fact that it can enter adult discourse is the symptom of the degeneration of our society.
True enough, but the popularity of said arguments means that you need an effective counter. “Grow Up” isn’t going to get a lot of traction. Explaining that the quest for fairness leads to even more unfairness is what you need to do.