That drives me up the wall too at times. It's a recurring theme when teaching languages to do it through something the author (maybe implicitly) consider a go

That drives me up the wall too at times. It's a recurring theme when teaching languages to do it through something the author (maybe implicitly) consider a good fit, something that emphasise the beauty of that particular language. Might be good while you are learning your first language, maybe ? This explains the IO/side effect heavy imperative tutorials, the structure rich OO tutorials, the 'algorithmic' FP ones, etc. Turned upside down quite clearly tells you which language is strong in a particular area, and complicated/awkward in another. Myself, I prefer to start with the ugly parts, they contain much more information about the tradeoffs and focus of any particular language.