What people are talking about are the subtleties of interpersonal interactions. Rules for that don't usually work too well, especially if those rules are rigid or inflexible. Humans and the way they relate to each other are too complex for a nifty tool kit. Respecting and honoring people does work. Some people bring more of that in with them; and others need to learn about it with some guidance. That learning can also be therapeutic.

Therapists also learn. In fact, they are required to to keep their licenses. Therapists evolve and change over time from these experiences. Things that they learned in training may drop away, replaced by things they learn after either through the reading and workshops they do or mainly through working with clients. It seems to be a very fluid profession that way, with people being pretty adaptive and flexible. After all the field itself shifts a lot with new methods and research all the time.

And the relationships change and grow too. My shrink has relaxed into a more informal mode with me over time. He knows I respect and honor him as he does me so he doesn't worry about things. He knows I'm not going to take anything the wrong way or let something damage the working relationship. So he is more casual with me than he might be with others with whom he has to maintain a more professional seeming stance. This all feels very natural and what just evolves in human relationships. It's about trust.