You are not wrong but for many the effects of ADHD can cause depression and the effects compound each other.
In my experience the right meds can push past that initial lack of flow state and allow accomplishment of tasks. Without it depression comes because you can't understand why you aren't just getting things done. Snowball effect..
Agreed. Symptoms of both are very dynamic. I was only pointing out how they can interact in certain cases. But it's certainly common undiagnosed ADHD can lead to depression over time. Everyone is different of course.