In my experience, financially savvy/well-off young people usually get an apartment before they get married - they either get it (or a large downpayment) from their parents or they buy one some time in their 20s - but don't get married until their late 20s to 30s.
People of my parents' generation got married way earlier, typically in early to mid 20s, so it was natural for them to build a life together.
Have you seen the statistics? 20-somethings who own a house are super minority right now.
And plus, rich kids with properties from parents money, has nothing to with the growing loneliness epidemic I was discussing on why people don't pair up despite economic pressure to do so.