Because it's inherently unstable.
The modern mortgage is only 100 years old, and it's caused crisis after crisis. They happen faster and faster too, with larger and larger bailouts to keep the system afloat
The debt system only works if you have infinite, ever accelerating, the rate of acceleration ever accelerating, growth. There's no new markets to expand into, we're running up against physics
You can't build a modern house without thousands of man hours, making a savings approach impractical? Then don't.
Build differently. It's that simple. Our ancestors figured it out for 100k years, then for a century we went crazy with it, and now it's all falling apart
You can't tell me there's no better way.
I love watching YouTube videos of 5 people building a house in a year just on weekends using Earth bags. A team of Amish people can build a house in days. I watch ones where one person builds a house. There's a guy who built a castle by himself, stone by stone
The man hours are so expensive because everyone has to pay interest on the debt, and the practice of borrowing from the future means every step of the process money is being siphoned off