Maybe I just suck at accounting or productivity

but having a child actually rejuvenates me to do more. yes I probably staring at the screen less number of hours per day, becuase I have children. But I wouldn't say I was doing 10X as much as when I was a bachelor. there is only so much effective work you can get done in a day before you're out of ideas and need sleep or break. playing for 2 hours with my kid gets me fresh and kicking no matter how badly my day sucked.