I think it is a necessary part of the journey of life. I married my first wife and then met my now current Good Lady of many years shortly after. That was a heart breaking and a half. I do regret the misery it caused and my part in that misery but hey ho. It makes us who we are!
And you can't actually help it when the right one comes along, right? It must be quite hard to end a marriage and even harder to do it without one or both being wounded.