Yes, if you are already 'self-actualized', you don't need to be thinking about behavior modification frameworks, your behaviors are already serving you.
Some people have circumstances and long-lived reactions and behaviors for those circumstances that make it very difficult to change course, even if they have a real desire to. This 'disconnectedness' between lived experience and personal goals and values can lead to a lot of anguish. In those cases, following a framework, even though it can feel 'weird', can lead to the positive sparks required for change.
Also, there's motivation and there's (self-) discipline. You get up in the morning or do things either because you feel like it, or because you have to. Of course it feels better if you feel like it (you're motivated), but if you're not motivated then discipline has to take over.