It's a freakin' desert, and far outside civilized areas. Also, raiders don't outnumber citizens 10:1. Funny enough, unlike FO3, the raiders' presence is somewhat muted. Of course, being a warzone, soldiers are quite numerous.
Sure, but you can't blame Obsidian for Bethesda's version of Gamebryo.
I thought we already came to the conclusion as to Quinns' WIT.