In a Wikipedia article on Malvina Reynolds, her daughter Nancy Reynolds wrote:

"My mother and father were driving South from San Francisco through Daly City when my mom got the idea for the song. She asked my dad to take the wheel, and she wrote it on the way to the gathering in La Honda where she was going to sing for the Friends Committee on Legislation. When Time Magazine (I think, maybe Newsweek) wanted a photo of her pointing to the very place, she couldn't find those houses because so many more had been built around them that the hillsides were totally covered."

If you look at Daly City's website, there's a link to 'Westlake Book' about Little Boxes: The Architecture of a Classic Midcentury Suburb.

There are all sorts of reasons to get offended and I'm sure people here will eventually explore all of them, repeatedly, but criticizing 1950s era American architecture isn't something that seems very worthwhile.