Well, it makes sense for tutorials to use what they can to simplify the bits they're not focusing on, but certainly implementing a construct by mapping it into an identical construct is not going to be terribly informative as to the workings of that construct. That may be totally appropriate if the focus of the tutorial is on the parsing or such, but it sounds like that sort of tutorial (of which there are many, and which are perfectly useful to other purposes) are not what you are looking for.