Earlier quoted context omitted.
If you have kids getting up at 6 for school and you haven't adjusted your sleep schedule to match, isn't that kind of on you now?
How does one do this? Parents get up at 6 to get their kids ready for school. Then take the kids to school, shower, have breakfast and then work until 6. Picking up the kids at some point in there. Then make dinner, family time and then kids go to bed at 8 or 9. Now you have the option of going right to sleep which is fine if you desire no personal time / partner time. But if you have your own hobbies or goals then y…
If you want to have both parents working, stay late at the office, have both parents involved with kids for every activity, and also work on side projects late at night, you're going to struggle until the kids are more self sufficient.
Even without kids, waking up at 6AM, hustling through morning routines and to the office, working to 6PM and then getting home at 6:30PM (assuming commute) leaves about 3.5 hours of free time and 8 hours for sleep. If you're trying to shoe-horn involved hobbies and side projects into those weekdays, something has to give regardless of whether or not you have kids.
The standard parent learning curve usually involves: Becoming more efficient with your routines, becoming more efficient with time management at the office, learning to say no to unnecessary requests, pushing back on jobs that demand long hours (or changing jobs to a more reasonable 8-hour workday company), becoming more efficient with meals and grocery shopping, doing more tradeoff load sharing with partner instead of both people being involved in everything, and letting kids have more independent play time as they age.
That said, you simply won't have as much alone time with kids in the equation. If you're trying to do too much, you have to sacrifice somewhere. It's better to do a few things well than to try to do everything at 75% commitment or being 75% awake.