After I started my family and moved out to a bigger city, all of these things changed. Your parents cannot help with the children because they are in another city. For me and my wife it takes about an hour both to reach our jobs. And the kindergarten we were taking our kids to was about 30 minutes (by car) away. The ones that are near our house or near our work-places had 3-year waiting lines.
And then there are winters and heavy rains. And you might have multiple children all of whom need to be taken someplace in the morning. It's just not realistic to bike, unless you somehow have everything nearby.