They are not designed to work for every guitar teacher in every situation. They are just things that (sometimes) work for me and might (sometimes) work for you?
Every teacher is different. Every student is different and every lesson is different. There is an old saying that “you can never step into the same river twice” and while you need to have a plan it is important to be able to adapt (or even abandon) it should the occasion demand or the opportunity present itself.
You may find that a student needs to go back over some old ground that you thought they were comfortable with or it could be that you discover that they are more competent with regard to theoretical knowledge or technical ability than you expected at the start of the session.
The list of potential variables that exist at the beginning of any lesson means that it is almost inevitable that the experience that you deliver to your student will not be quite the same as the one that you thought that you would be providing at the start of the session?
For me, the key to teaching guitar is to work out the answer to the question “what is the best thing you can do for this person’s musicianship within the next hour”?