If I'm so unproductive, why do I get great job reviews?

I work at a large company, have two kids, run a side business and have a hobby that takes a LOT of time. In the course of an average week, I do my job well enough to make my boss think I’m great, keep my kids and business partner happy and make adequate progress on my hobbies, but I can’t help but feel that I’m spending at least 40% of my time just zoning out and spinning my wheels trying to get a handle on things. It’s not the number of projects I’m juggling at any one time that gets me - they are all either necessary (having a job, taking care of the kids) or personally fulfilling (having a hobby and running a side gig). It’s the lack of down time and the constant feeling that somewhere, I’m dropping the ball on something.

I’m having a hard time believing that I’m the only one like this, and I’m curious to know what other folks do about it.