> Meanwhile, everyone knows that these giant trucks and SUVs are killing people, but we do basically nothing.

Too much money is tied up to giant trucks and SUVs being the norm. These vehicles only came into widespread existence due to the infamous "SUV loophole" [1], accelerated by them being much more profitable for manufacturers as there was (and is) far less competition in the truck/SUV space from non-American manufacturers and, with that, less competitive pressure that tends to eat up margins.

[1] https://www.distilled.earth/p/the-loophole-that-made-cars-in...