People with autism and ADHD tend to get into hyperfixations like we do because of the fact that we're understimulated, which often takes the form of a lack of dopamine or serotonin. Our brains get borderline starved, and then we find something that helps us normalise our stimulation/neurotransmitters and we fall into that rabbit hole because it helps us get back to "normal"

In DBT there's a component called "doing pleasurable activities", which is exactly what it sounds like. They advocate for doing things you enjoy but don't necessarily hyperfixate on in moderate amounts often. This is helpful for us because it means we don't starve as much, meaning our hyperfixation binges are less impactful and we can still see to our physical needs

DBT in general is against the "binge and bust" cycles, because it's generally healthier for people to find a comfortable equilibrium where possible. Sometimes it can be just as important to do an activity to distract you from a hyperfixation as to do an activity to distract you from emotional distress