Because most of the younger generations didn’t have a chance to buy in at the lower prices, and hence haven’t owned much as a percentage at the same ages. Boomers own most of the real estate right now, and have for a very long time.
It’ll spread around more when they die.
At least as this quotes “Millennials own less than two-thirds of the real estate Baby Boomers did at the same age”.
https://www.populationpyramid.net/united-states-of-america/2...