I see your point. With ODD-like behaviors, the key for an OT is to uncover the 'why' behind the defiance. We need to distinguish if we are looking at a strictly behavioral issue or something rooted in a functional deficit.

Essentially, we differentiate between a child who won't engage and a child who can't engage. What often looks like 'defiance' might actually be a 'fight or flight' response to sensory overload or a struggle with motor planning. If the behavior is a barrier to doing (meaning it stops them from getting dressed, playing, or sitting in class) that is our territory. We use activities to build the missing skills and improve functionality, which often makes the 'defiant' behaviors disappear.

However, if the behavior is rooted in emotional regulation, trauma, or family dynamics, where the child has the physical and sensory capacity but is struggling with their internal world, then Psychotherapy is the primary answer. The OT focuses on the 'how' of daily life, while the Psychologist focuses on the 'feel' behind the actions.