I can't tell you how many times I write out code, get it all done. It works perfectly. But being the perfectionist that I am sometimes, I look back on it and think, "This can be written so much better." Sometimes, I can take 10 lines of code and transform it into 3 or 4 lines of code.

And yeah, maybe a human being won't notice the difference in the time it takes to execute 10 lines of code vs 3 or 4 lines of code, but the developer knows those few nanoseconds can be reduced.

Code is poetry!

That being said, I do appreciate the author's sentiment of insuring the code is easily readable by humans.