Earlier quoted context omitted.
This isn't true in my experience. I've witnessed plenty of people in wealthy US suburbs that stock bottled water at home and even stock up on vacation. They claim it's for the taste and purity.
I don't know about purity but the taste can indeed be better than tap.
Many people have become familiar with the flavor of plastic, and learned to associate it with “purity” or “freshness” or “quality” or whatever.