That was my overall point. Fairness is manmade. We decide what's fair and not and certainly your concept is different from mine. Nature doesn't care. Markets don't care. Systems don't care. All we can do as humans is impose our view of fairness on others by legal means or social norms. Most of us agree killing is bad and unfair to the person who got killed and their family/friends, so we legislate against that.

While many might feel that kids of rich people have an unfair advantage, we haven't as a collective decided to do anything to put that to an end. We have made it a bit easier for non-rich kids to get some of the benefits that rich kids get like daily meals, access to education etc. but the gap is far too wide to bridge for everyone.

You can certainly try to design a social structure where nobody is rich or nobody gets preferential treatment but those haven't worked well so far for numerous other reasons. In a capitalistic, democratic/republic society, we haven't legislated the unfairness of being born rich, mostly because most of us don't think it is unfair enough to be illegal. In fact, most of us would think it is fair when looking at it from the parents' point of view. If you work hard and make a lot of money, why shouldn't your kids have it better than you did?

What I was trying to say to the parent was that fairness is not a concrete standard, especially when it comes to things many of us can disagree on.