Only 35% of Americans have a full time job. Also likelihood of being married falls and rises with income. The median of those full timers would be the 17.5% of that group. It would be generous to say there are 2.5% of retired Americans making more yearly income than that median couple, but let us say that. It would still be only 1 in 5 Americans that can afford that $357 thousand dollar house.
Also - around 50 is when earning power peaks. People in their 20s and 30s make less on average. So this median couple might eventually be able to afford a house, but they may be 50 when that happens.
$357000 house for a couple in their 30s. Both put $35k down - or have to pay PMI on top of principal, ~7% interest (if their credit is good!), taxes, home insurance, and in many places an HOA.
Also this is onerous even with two parents working full-time who may have to figure out how to manage raising 2.1 kids. Decades ago in the US, plenty of people were doing this on one income.
https://en.wikipedia.org/wiki/Personal_income_in_the_United_...
The median house price is 357k.
https://www.zillow.com/home-values/102001/united-states/
So, on aggregate, for a couple who both work, a house is affordable.
And things aint gonna get any better..... The USA has the best economy in the world, and wealth redistribution is not on the agenda.