No, it's just that child care doesn't turn off at a set time like most jobs do. Your schedule might be 6am-8pm, with multiple periods in the early morning while you're up.
I say this as a person who has been both a full time programmer and a full time care giver. Being the care giver was far more frazzling and non stop compared to my job. I found it far easier to pursue personal interests when I was working full-time compared to parenting full-time. Pretty much my only time without a kid in my life would be late at night, and even then you need to stay in the house to watch them, and you may be too tired and sleep deprived to actually be able to pursue an interest if it is pursuable in your own home.
