Just to make clear, if the tow vehicle breaks down, that is your best option.
What I am describing is the moments after the tow truck leaves with your TV. You and your family are still along side the roadway with the family dog in 90 degree heat.
Now you need a second "tow truck." (How many tow trucks are set up to tow fifth wheels?) Maybe it's a busy holiday weekend and it seems no one else is available for a while -- it might be nice to have another option to consider. How about a retired RVer who lives nearby and has a towing ready TV and maybe years of experience.
We're not talking about towing you to a suburb of Promontory, Utah. Maybe just to a nearby campground so you can wait for your truck. Or, as you indicate, you can wait for a professional tow for your RV, too.
Many years ago, I joined AAA when I left with my MG-A for college in fairfield, Iowa. I believed I was covered if I broke down anywhere in the US. At least that's what AAA said. On the way home from a movie in Ottumwa on a rainy night, about 11PM, I got two wheels off the highway into the Iowa mud and couldn't move. There wasn't a tow shop open between Iowa City and Des Moines. That taught me how worthless my triple A membership in Iowa was, at least on that particular night
A nearby farmer got his tractor, pulled me out and we were on our way.
Was he licensed and insured? I don't think so. But he was my hero that night.
RVers helping RVers has always been a common theme in this demographic.