Objectively, I understand what you're saying here, and agree that it's almost certainly happening.

Subjectively... I see people around me casually doing things that I simply cannot do. I'm 41 years old, and not once do I recall performing any action without actively forcing myself to do it. That includes things as small and trivial as getting up from my desk to use the restroom.

I can't relate at all to the concept of a "habit". Combing my hair requires an explicit decision to do so. I usually have to find my brush, since there's no consistent place I put it. When I'm done, I'll forget that I wanted to put it back where it belongs while actively being frustrated with myself for not doing so the previous day.

It's glaringly obvious to me that other people don't struggle with the things I struggle with; at the very least, they don't struggle to the same degree. It's exhausting.

Oh, and I've never even been diagnosed with autism. I have ADHD. What I described above is classic "executive dysfunction".