It doesn't matter for the parent's argument that most people, on the whole, don't live in jail in the US. Chance of incarceration and longer sentencing is higher for racial minorities in the US. That is true, and it is not an exaggeration. [0-5]
The point of the knowledge isn't to just "treat people differently", its to recognize something is broken, identify root causes and change them.
I'd be very curious to better understand the motivation for your perspective.