It's stunning how many people seem to forget that there are other countries on the planet that use dollars and weren't involved in Vietnam. No, I'm not making an assumption. The person who posted this is Canadian.
Y'all really need to take a step back and reflect a little bit.
When my parents bought in the UK in the early 80s, the average family house was £20k. But mortgage rates at the time were ~20%, meaning you had to pay £4k per year just to cover the interest alone, and the average salary was below £6k.
Yes, interest came back down after a few years, but a lot of people learned about Negative Equity during those years.