If you want something nice, you have to earn enough money and buy it. We don’t give mansions away for free.
In our system, you don’t have to earn any money at all to get what you want, due to a thing called inheritance.
Well yeah, people are allowed to decide who gets their stuff when they die. So what? My mom gave me my father’s ring when he died. You trying to say that was wrong? We should have given the ring to a total stranger who was non-white?
We do indeed give away mansions for free. After being born a multi-millionaire, you can spend your life pissing it away like Trump (he’d actually be much richer today if he’d just invested the wealth he had as an infant in a diversified fund), or you can be born a multi-millionaire and build on it like Bill Gates. But would you have done as well had you not had multiple millions of dollars when you were still in diapers?
That is the way a free market works. However, I do see your point when comes to the social-economic effects of slavery and years of jim crow and discrimination. Maybe it is a good reason for things like affirmative action.