Sweetie, I'm half Black, and I say this...first, we usually mind our own damn business. We also have no problem looking after our own. We've survived for generations because we care for our own (ain't like anyone else was offering).
Second, just as a human, not anyone's business.
My 3 boys are all Millennials. They're 34, 31 and 29 . I'm a Gen X. My middle son lived with us for about 2 years from 28-30. So?
If you've created a home and an arrangement that works for everyone, more power to you. Society can kiss your ass.