For those of us who have kids, you just sit back some days and wonder... How little we recognized at the time, the sheer freedom of being able to just head out for dinner or a drink any day of the week, plop down and watch whatever movie we wanted, sleep in on the weekends, etc.
OP does acknowledge the workload of having children is "indefinite" but doesn't really do justice to the reality of raising children.
The funny thing is how that theoretical 10 hours per week of free time will somehow make way for the ~40 hours per week spent on the children. Shopping for new shirts because they don't excite you anymore? Yeah, parents ain't got time for that BS!