A US car manufactured to withstand south american unpaved roads would be largely wasted. 99% of people won't ever use them in that manner. So money is spent on things they will use (like infotainment systems and more "creature comfort" stuff).
In an area where unpaved roads are more common, the suspension might be beefed up, thicker steel used, an overall hardened vehicle, but the interior will be a shell of what the US car would be.
A US car manufactured to withstand south american unpaved roads would be largely wasted. 99% of people won't ever use them in that manner. So money is spent on things they will use (like infotainment systems and more "creature comfort" stuff).
In an area where unpaved roads are more common, the suspension might be beefed up, thicker steel used, an overall hardened vehicle, but the interior will be a shell of what the US car would be.