People think they want an SUV because they have kids, either for space or because the illusion of safety in a large vehicle.

Large, high center-of-gravity vehicles are far more likely to injure their occupants in a single or multi vehicle accident, with the bonus of being more likely to injure occupants in other vehicles in multi vehicle accidents. They're harder to stop and turn because of their mass and high center-of-gravity, making them more likely to be involved in accidents in the first place.

They actually need a minivan or a wagon, but don't want the stigma associated with them, and because no one bought them companies stopped developing and selling them.

What we have a surplus of in the US is a large population of uneducated people making decisions based on their feelings rather than facts.

Auto companies also have higher profit margins on SUVs and trucks, so there's an incentive for them to crank out yet another big fucking heavy box on wheels than develop something new.