I don't take school age children but if I did, homework would not be part of our curriculum. When children get off school at the end of the day, just like when parents get off work, the last thing they want to do is carry on again in a different location. Children need an opportunity to recharge mentally and for some respite.
One of the biggest threats to the health of people these days is the balance of stress, sleep, diet and relaxing. While most people can cope without these 4 main stays as being less than perfect, they do need to get the balance right. Attending school and then headed to after school care to continue with school work, doesn't teach children that it's important to step away each day and take some time for enjoyment. It's not reasonable to expect a child 12 years and under, to work on academia from school opening to closing and again once they get to their after school program. Some play, social interaction and down time is more important and they can do the home work when they get home and parents are preparing supper.