I think we don't give the subconscious enough credit for "getting things done" so to speak.

Since youth I've had (what was always termed a bad habit) the habit of jumping into a task and then never touching it for a week.

For sure there was constant worrying and ruminating on the thing I need to do, but I also have my mind ample amounts of time to 'sleep on it'. So when it came time to sit down and finish the thing, so much of the thinking and ideating had been done and I simply had to convert that into mechanical output.