It's unfortunate that such detailed instructions are needed to understand and use some of the functionality of the Apple Watch. Apple used to pride itself on making UI's that were so simple and intuitive that no operating instructions were needed.
While undoubtably the best Smart Watch around, there are aspects of the UI that are more convoluted and complex than they perhaps ought to be.
But to paraphrase Steve, making things really simple is actually really hard.
FWIW, unless someone is not "techy" at all, this app, and the watch in general, are much easier to use than the internet makes it seem. I was expecting a steep learning curve but all the operations become familiar in about an hour or so.
I found, even the walk throughs on the Apple site make it look more confusing than it is in your hand.