Earlier quoted context omitted.
A single mother working as a waitress at Denny's in the 1980's had more spending power than a college educated cubicle drone in 2019 Do you have any source to support this? Because real median personal[1] income went up almost 50% since then[2]. [1] — don't confuse it with real median household income, which didn't grow nearly as much, because of a significant rise in single-person households which pushes the median…
For some simple examples, inflation-adjusted home prices have gone up by a factor of 6 and inflation-adjusted education prices have gone up by a factor of 3 over the past few generations [1], while inflation-adjusted average wages have only gone up by $2/hour [2]. That single mom would have had a dramatically easier time providing housing and education for kids even with lower purchasing power for most consumer goods…
Which home would you prefer to buy:
$150,000 at 15% over 30 years. $350,000 at 4% over 30 years.
Hint: they both have approximately the same total loan cost and payment.
You can do this calculation with your parents. My home cost $350k at 3.8%. My parents bought my childhood home for $88k at 8%. Adjust my parents' home price for inflation and run the result through a mortgage payment calculator. You find that I paid slightly more for my home but my home is much nicer (central heat and air, closer to town, larger, better schools, etc).
My parents' home happens to be for sale currently (not by them). If I paid full asking I would pay MORE in raw dollars but LESS in inflation-adjusted-total-loan-cost (which is what actually matters).