For a short while years ago, I believed that. But when I realized how disruptive children are in service, and young parents wouldn't correct them, I quickly changed my mind.
When I was a child, we'd better sit still and be quiet in Church or else! Kids need to be in separate services since their parents won't correct them. It's very irritating and distracting to have them in regular service. I've given plenty of "looks" to mothers with loud, talkative kids in Church, only to be ignored like they don't see what their little munchkins are doing.