Again... you are missing the point. Not everyone is as fortunate as I am to be able to afford a (used) modern diesel and a nice travel trailer. Some people have to use older cars, older trailers, tents, or simply not go and enjoy these experiences with their families.
No, they do not "have" to, and that is sometimes the problem. People have their priorities so screwed up that they are putting their families in unsafe situations simply because they can't say "NO" either to themselves or their children.
I'm not talking about simply running "not new" campers and tow vehicles. My truck is 15 years old and my camper is 17 years old. I am talking about situations as depicted at the beginning of this thread, where the trailer in tow is clearly exceeding the tow vehicle's capabilities.
But I guess if you get from point A to point B without killing anyone, we should all just shut up and be okay with it.