Unfortunately, it tends to be _read_ as a how-to book rather than as a catalog of observations. I have actually heard from a professional software engineer, "We can't write the code this way because it's not using any known design pattern," said with a straight face. This is partially the mentality that gives us things like the classic AbstractSingletonProxyFactoryBean[1] class.

1: https://news.ycombinator.com/item?id=4549544