I'll buy that "Modeling and Honest Communication" is slower, and probably respectful on at least one level,but I'm not so convinced about humane. What if the behavior you sought to change were self-harming --cutting, bashing head against wall, or other clearly physically harmful? Would you model sitting calmly, perhaps saying that calm is nicer? Or would you restrain the extreme behavior, for however short or long a time? Wouldn't restraining someone bashing their head against a wall be more humane than letting them continue?
I don't argue that there aren't abuses in programs that purport to modify behavior, and even regard "behavior mod" as quite different from therapeutic.
What about a guided wilderness experience, where a person is given all they truly need, and are taught how to do what they have to, but don't get warm food if they don't choose to start a fire and heat/cook the food? That is modeling and honest communication (as the group leaders would be in the same position regarding food), and I don't think it abusive. Some do. Do you?
And can you draw an inflexible line?