Anything CAN tow and they all have OEM ratings
Heck, a half ton CAN tow the Space Suttle (190,000 lbs)...have seen videos shoeing a VW towing a 747
Pure marketing and lost is how long will it do that, what incline CAN it tow those things. How will they be able to manhandle them in a Mr Murphy moment
Monocoque can be designed to tow heavy and monocoque failures like breaking in half are rare...they will rattle like crazy towards their end of life. Understanding how spot welds fail is key to any discussion of monocoque designs...like a monocoque can be much tirsionally stiffer vs a ladder frame...initially...down the road may be a different story
SUV...CUV...has blurred. OK...the fashion statement crowd typically do not care about details underneath the skin...bells and whistles at the top of their list
Just buy what you like and enjoy your decision...towing has additional metric which should be considered...