This is often how I feel. There have definitely been days when I just sat around doing nothing, but even on those days I find myself reading a book, practicing a language, writing down ideas, practicing music, and thinking about things that matter to me. I feel like not doing 'something' is a waste of time and brings me no value. Even in times when I am 'doing nothing' that I think of right now, I am generally at least walking or doing some exercise.
I strongly recall going with my parents to the laundromat as a child and sitting there for 3 hrs straight on a chair. I had no phone, no book, no other kids in the building, and the arcade machines and other things all costed quarters that I didn't have. I would just sit there bored out of my skull, and I hated it more than anything else in the world. It wasn't like playing outside with friends where we could invent our own games, it was cold sterile nothing in a smelly building. When people complain about contemporary kids on their tablets or phones 24/7 and how this is bad I always think back to these times when I literally didn't even have a crayon to scribble with. The times I remember fondly of exploring/playing/running around the neighborhood/drawing/ fighting/ etc are more memorable, but in terms of objective measurement, were vastly outweighed by sitting doing literally nothing. I feel like people often view the world with rose-coloured glasses when they write these anti-screen messages.