Wait a moment here! I moved out of the house when I was 16 because my father, a widower, remarried a woman I didn't along with. That was a bit harsh, yes, but he helped me with rent, helped me fix my car, get a job, was there for me with advice & support (I didn't move that far away). He even helped after I got married & was working in a job that probably paid more than he had ever made.

My own son moved out, to attend college across the country at age 19. He also worked, rented a home. In addition to paying his rather considerable tuition, we helped when we could. Later he & his fiance would stay with us, sometimes for a year at a stretch, before moving on. We were always willing to help when needed.

I think that children leaving home at 18 & not receiving aid & support from their parents is very, very rare & probably a sign of familial dysfunction.

As I wrote, that is also changing here in the US. More adults (not children) are staying in their parents' houses past their twenties. I don't know if that's necessarily healthy, because they're not building the wealth & independence they might need later on. Suppose their parents develop severe health problems or require some form of custodial care? Often their childhood home is sold to pay for that. They're left with nothing.

And yes, that's one more thing I absolutely hate about the US, our ridiculous health care reimbursement system. But racism? Again, I'm dubious.