Thank you for this. I think most people are like this, me included, when we don't have a project that actively interests and excites us.
This whole ADHD thing might be just true bullshit. Some people just chose to do the absolute minimum to survive/provide for their families at times AND also do A LOT some other times when the situation is, well, different.
I don't need gray hair, RSI, headaches, coffe, glasses etcetera to climb the ladder or drive the latest car. But to each their own.
Also, sorry to those that actually can not function and might feel put down by my comment.