There is not always a choice. In fact, life is often about having one "choice" or having limited bad choices.

Sometimes they're your only choice depending where you live. Some people have transportation issues. Some have money issues. Some need someone who takes their insurance. Some are powerfully attached. Some fear change. Some remember when the relationship was good and hope those times return. I mean, why does an abused wife stay with her abusive husband? Would we criticize her?