With all the pressures and demands of things that must be done, parents tend to see personal time as an option, something that can wait till later. Well, it can't wait. Personal time is a daily insurance policy against the hazards of stressful living. We can neglect ourselves for a day, a week, or maybe a month but the wear and tear will begin to show. We can't afford NOT to take personal time every day.
Mental institutions are very expensive.
We are doing our families a favor when we take some personal time. As kids get older, more time will be available. If time must be stolen from some other area of life, trivial household chores would be my first choice. If we can find a way to do less around the house, we can use the free time for personal use. Household chores will still be there tomorrow.