Thanks for your question. There is no easy answer. Pediatricians today tend to work in group practices. Physicians within the practice "cover" for one another when patients have medical needs after hours. In years past, many physicians had individual practices and had to be available 24 hours a day for emergencies. Today, not so much. Another physician in the practice may be "on call" to address an urgent matter.
Also, those that enter the medical profession today have greater control over their time. One of my family members chooses to practice medicine only two days per week. She balances her time with family and does not want a full time career. Others may want and be motivated to work a full week. The good news is that the medical profession can accommodate both types of individuals. There is no right or wrong. It is a personal family decision.
Good luck as your consider your career path!