How would that work, even on paper? Not being a dick, just don’t understand. So it’s literally just, “you can never own this property fully?”

Yes. The tradeoff is you have a property that is in your name (with a bank note attached), and if the property increases in value during the time you own it, when you sell, you pocket the difference. If you have a fixed interest rate, it also caps the growth of your payment for housing for the entire time you live there. There’s quite a bit of value in that.