tl;dr: A founder reflects on the tension between startup ambition and fatherhood, noting that many admired builders (Jobs, Einstein, Musk) were notoriously bad parents, and rejecting the common trade-off of delegating parenting. He disputes the "quality time" theory in favor of maximizing quantity, especially when kids are young, and acknowledges his output is measurably lower than his pre-kids self. His approach: redefine ambition to include being a great dad, then compensate through ruthless focus, health, strict family time rules, and cutting time-wasters.