100 hour workweeks kills people, 40 hours of work and 60 hours of parenting doesn't, 100 hours of parenting doesn't. Parenting therefore isn't work, parenting is life on the work-life balance spectrum, so it isn't soul crushing in the same way work is. Parenting can still be a lot of work of course, but it isn't work in the same way a job is work, it is more work in the way a vacation trip is work or a hobby is work.