Well, one should not forget that our parents' houses were partly simply equipped, but many times larger. You can hardly find a house from that time with less than 300m2 of living space. Today, everyone builds only half as large. So be careful with your comparisons.
The whole discussion is nonsense, it is repeatedly proven that the real estate market has decoupled from reality. Our house alone has increased in price by 80,000 euros again this year. Wage growth thanks to Corona 0%. Interest rates have not changed either.
It has gotten out of control because too much money is being pumped into the markets...