>>713188984
The cities in DS have nothing for Sam. It's not part of his job and the streets are said to be mostly empty, they just serve as a background. Yes they could have shown a few bunker interiors like the Higgs one when you unlock the ability to rest in them, but it's not necessary to get the point across. Especially since the game had a really short dev time and they had to cut a lot of corners.

Not sure if DS2 will let you enter the bunkers and get to know the preppers more intimately but you can hang out with your crew on a ship