Equity is a red-herring. People just want a place to live. Developers want equity.
Developers want equity because it is financial security and passive income for them. Regular Joes want it so they don't pay rent in perpetuity; that they may have a place to live in old age without working, among other reasons.
If there wasn't an endless drive to increase the value of homes, this would all be moot.
All my friend's parents that didn't own their homes are completely fucked now that they're old, retired and their pensions didn't keep up with inflation. If you don't own the place you live you're just a rent hike away from the streets.