I don't think that's telling the whole tale.
Soon after my parents got married in '74 they bought their first home, brand new. It cost 5 years of my Dad's salary at the time (a new teacher). So with the two of them working, they paid it off in just over 3 years.
Go find me a house for sale now that's less than 10 or 15 years of an individuals salary.
The world is a much different place - so I think people want the nice things their parents had, and they'd be happy if it were even the same timeline, but it's much, much longer.