2015 Jeep Grand Cherokee wheels problems

Our daughter bought a 2015 jeep grand cherokee approximately six months ago. Her "dream car". Two weeks ago, while driving home from los angeles, her rear tire blew out, causing her to spin out on the freeway, getting clipped by a big rig and tossed into the carpool lane, facing oncoming traffic. She was somehow able to get to the shoulder of the road without involving other vehicles. She was by only a miracle, mostly unharmed. This is a new car. The tires are michelin.

NHTSA: I have been in and around the tire business most of my life in 2015 I purchased a jeep grand cherokee with 20' wheels and tires. In december of 2017 I literally got blown off the road into a ditch severely damaging my vehicle. I believe there should be a certain pressure per square inch factor on wide tires as mine obviously did not keep me on the road and they were heavily siped winter rated tires.