The truth is that MOST motorhomes are designed to tow, some as much as 10,000# or more. It is absolutely NOT hard on the RV unless you are overloaded, but that is a different issue.
RV folks like to have a car at their destination to use for local transportation. They must take it along to travel. Some cars can be "flat towed" with a tow bar, which causes absolutely no excess wear and tear on the car. In fact, there would be MORE wear if the car were driven instead of towed. Manufacturers in fact approve of flat towing on some vehicles. ABSOLUTELY NO DAMAGE TO THE VEHICLE other than tire wear.
Some cars can be flat towed IF an auxiliary part is added, like a transmission pump. Again, this is approved by the manufacturers.
In both cases above, the warranty is not affected by flat towing, so it MUST be okay.
Flat towing is MUCH more convenient than trailer towing. No need to load a car, tie down the car, hitch up the trailer, chains and wiring. No need to find a place to store the trailer when camping. You reduce the weight being towed by the weight of the trailer. Flat towing is much preferred over trailer towing.
Some Front Wheel Drive cars can not be flat towed. For these, it is often preferred to use a tow dolly over buying a different car! Dollies can be used on most FWD cars, so trading cars requires no new equipment. While flat towing is preferred, dolly towing is much preferred to trailer towing. Cars are easier to load and secure. The dolly is MUCH lighter than a full trailer. Dollies are much easier to store when camping. Again, for cars approved for dolly towing, it will not void your warranty. It does not damage your vehicle.
Some vehicles can not be towed four down or dolly. This is true of many AWD and RWD vehicles. Note many 4WD can be flat towed. These cars will need a full trailer.
I ran a non scientific survey last spring. Of 20 RVs with a vehicle in tow, 15, or 75% were flat towed.4 or 20% were dolly towed. ONLY 1 or 5% was on a trailer with 4 wheels up. These folks put MANY miles on these cars each year. If they were damaging the car in ANY way, they would not do it!
My question to you is why do I want all the extra weight and hassle when it is clearly not needed. Where did this bad data come from?