I've been in cars that were being pushed all over the highway by strong wind, etc. It's all in how the car is made. One of the reasons I won't buy a Toyota is the way the vehicles drive make me think the sway bars are too thin. I've noticed a lot of lean in corners. A strong cross wind will have any vehicle that's not well planted pushed all over the place. You have a solid point about give profile vehicles, but it can happen to lower profile vehicles, too. Nonetheless, if rather have a 3 row crossover SUV or a diesel Suburban as my long trip vehicle. The roominess makes a huge difference, especially if you end up pulling over in a small town where some "convention/rodeo" is happening and the hotels are booked up. If rather sleep in my car at a rest area and shower at a truck stop the next morning than pay $300+ for 1 night in a motel.
Btw, best wind storm I've ever been in was in Kansas. I was driving an 88 Fiero on I-70. Strong sustained winds, but the gusts were a real treat. They were so strong that they'd flex the hood downward and pop up the headlight covers. If have to slow down to get the headlight covers to go back down again.