Real property is an investment ... if you own it. If you don't own the land, property is a liability. That is because you have no idea what the land's value may be on the market at the time you may be forced to liquidate to make payments. More often than not, the value of the land will decrease if you're forced to liquidate. This is a huge risk that goes completely unappreciated by many.
If you own property that you do not use that you rent out for a consistent income stream, then it can be an asset even if you have debt on it. This is because you can easily sell this property in anticipation of hard times (whereas you cannot with a home). And moreover, it should be cashflowing even with the debt service, and anything that produces a real income is an asset. Although, still a risk.
I'm totally in favor of property, but frankly many property 'investors' are not investing. They're either consuming (your current home is a consumable and if an investment, an incredibly speculative one), or flat out speculating (owning property in the hopes appreciation will keep up is actually a bet on monetary policy and the interest rate, not on the actual value of the land / property). Property is only an investment if it makes you money in cash each month.
Also, cars are not a risk-free loan unless you live in an area in which you can accomplish most tasks via walking / public transit / cheap private transit. Most Americans do not. Thus the car is a necessity and the loan ought to be seen as a tax on living in a spread out area. Of course, no one actually thinks about it this way.