It's easy to say things like "slow down" or "think about composition".
What's nice here is that there is something concrete offered as a methodology for practicing observation of the frame.
The examples don't have to be stunning. They are demonstrating exactly what is intended - the practice of changing perspective and being mindful of the frame.
Since this is an article about a way to practice, the potential results will vary from person to person and will evolve over time.
I imagine there's a fairly wide variety of work and practice methodologies for advanced and professionals alike. Why disparage one practice technique if it's at all helpful to anyone unless it somehow encourages bad habits or you can put forth a superior one?