Being a parent teaches you how to stop procrastinating and use every second you have available. You are at your most productive era (work items per minute spent).

The bad news is that the day still has 24 hours, and that means that your career needs to adapt.

For example I had to turn down an opportunity that would require me to be putting 70 hours per week and I stayed at a job that I could do 9-5. That opportunity went sideways (the startup failed) so overall my career is fine.