A few years ago my mom was in need of an updated vehicle. She started shopping for full-size SUVs. When questioned, her justification was that she might need to haul herself + my dad + three kids + three grandkids = eight passengers = full-size SUV. (I'm not sure what happened to the three spouses in this equation, but...)
My wife and I unfortunately live 1250 miles away from my parents. My sister, her husband, and two of the grandkids live 850 miles from my parents. My brother, his wife, and the final grandkid live 400 miles from my parents.
Most folks are not good at evaluating their true vehicle needs. If they were, the Ford F-150 would not be the best-selling vehicle in the US for the entirety of my life. My retired parents now have a Toyota Rav4 Hybrid that gets 40 mpg on the highway plus an 275k-mile 1995 Chevy truck for around the farm.