This is brilliant and absolutely describes my personal experience. I think the “doing the thing” can also be broken down into subcategories of “doing the thing with the thing” and “keeping the thing working to do the thing”. My hobbies are motorcycles and pinball machines. They both require significant maintenance time, to the point that alone could be a hobby.
I heard it described as: motorcycle riding actually consists of two hobbies, riding and maintenance. Most people can't afford to only participate in the riding.
I think each riding maintenence have their own four quadrents.