I mean, it’s more than that though. You could sell the property at a loss or have it foreclosed on. Selling incurs fees of roughly 6-8% of the selling price… so, even if you sell it for what you bought it for, you could still be in the red. You might walk away $100ks in debt.
You can be jealous of people in that position of having multiple properties all you want, but ask yourself if you were in their position whether you would somehow respond differently to the incentives and risks?
If you had enough money to buy multiple properties what would you do?