There are bad debts and there are good debts. Bad debts- loaning money to buy a car that won't be used for business ( Uber, Bolt). Loaning money to buy a pair of shoes, clothes, a piece of furniture etc.
"Bad Debt" is debt that you must repay yourself.
"Good Debt" is debt that you arrange for others to pay off for you.
When you take out a mortgage to acquire a rental property, this is considered good debt. If you structure the deal appropriately, the rent from the house will pay off your mortgage bills, thus allowing someone else to buy an asset for you.