I know in my own marriage I stayed in it to provide my son with what I thought was a stable background and to give him what I thought was the family life a child should have with two parents. But that isn't always the best way and it took me taking my son to therapy after the divorce to really see it.
If you believe that health care is a public good to be guaranteed by the state then a single-payer system is the next best alternative. Unfortunately it is fiscally unsustainable without rationing.