...they have never been in a loving relationship. How can you believe in something that you've never had, or know how to find a person who will create this kind of loving relationship?
Those who have had a very loving relationship that yielded good fruit are more optimistic even if that relationship ended.
Imagine that you are the CEO of a company. You have an amazing CFO and together, you two created a very profitable business. It's because the both of you are excellent at your roles and you vibe with each other in ways that take the company to unimaginable heights. One day, you discover that the CFO embezzled some money. It's very out of character of the CFO to do so and despite apologizing and promising to never do it again, as the CEO, you must fire the CFO in order to preserve the integrity of the company. It is very bittersweet but it's the right thing to do.
However, because the former CFO was actually a very competent person who had a great connection with you, you don't give up on hiring a new CFO. You know what energy and qualities to look for - minus the embezzlement. You are looking for someone who has the same competency, but more importantly, the same energy because that's what it takes to work with you so that the company can continuing growing and succeeding.
Now imagine if you are a CEO with a very incompetent CFO whom you have never gotten along with. The company is going under water and has never seen success. You would start to think that the company doesn't need a CFO at all. Even if you posted a job position, you wouldn't even know what to look for. You are grasping in the dark, just hoping that maybe whatever you grab will stick and work out.