[nickff]

Maybe people don't want those houses; maybe people are happy to move somewhere less prestigious to get the house they want.

[WarOnPrivacy]

> Maybe people don't want those houses

It's not clear what kind of houses you are envisioning.

Go to Zillow or Hotpads (rentals) & search for less prestigious homes. You still don't get places that can be afforded with a HS Graduate income.

tl;dr: People can't move out in their 20s because of math.