Larger trucks & suvs also seem to have higher safety features these days in strength and crumple zone coverage. If so many other vehicles are so much bigger than my car, how do I fare in an accident in my ford fusion vs "everybody else's" f250. Someone else here called it an arms race and I absolutely see why.
I would rather drive my 4runner than my car even though my car is absolutely the better choice for practicality - I feel better and safer in my 4 runner.
This is in addition to edge case buying. Large vehicle purchases are also popular due to what those vehicles bring to the buyer, including: cargo capacity, towing capabilities, ground clearance for rural needs, and in the case of large vans&suv's extra passenger space.