I think the broader issue is that there is little valuable empirical evidence that the stuff people say is clean code actually makes things simpler. Likewise I find it unlikely that there is one way to make things simpler and its the way associated with the book. It's all vibes.
I like to keep in mind a companion rule along with DRY (don't repeat yourself): Don't make the reader repeat themself, i.e. re-read your code multiple times after you've cleverly repackaged it.
