It's not about the science of parenting and divorce. It's not "in the best interest of the children." It's about MONEY.
In some twisted way, my ex-wife assumed that she was the better parent and thus more entitled to the child support, the house, and the kids' care and feeding. As a good dad, this was just her assumption. Today, her assumption wound probably be supported by state family law. But, I believe times are changing.
I loved the family routine. I loved being their dad. I knew I was going to crash when I was no longer welcome in my own home. I knew depression was weeks away. I knew there was very little I could do to stop the sadness freight train that is divorce.