I don't think anyone was saying it's a willingness to be hurt, but rather a willingness to RISK being hurt.
I have said here a few times in the past that my husband and I are co-dependent, possibly unhealthily so, but there it is. When we became friends, neither of us wanted to deal with a romance. We wanted sex for sure (though not necessarily with each other), yet romance carried with it too much potential for further heartbreak, and we were both heartbroken enough. In those days, I frequently said, "I'm not looking for any man to make me any more pretty promises, and I'm certainly not looking to make any promises of my own. " I had lost any ability to be vulnerable with a man, and it often made me uncomfortable when they were too open with me. Every once in a while, if a man let me get in very close to him emotionally, I would take that as a sign that it was safe to let him in as well, and I usually got burned.
However, my husband and I found a way to be vulnerable together. Neither of us could ever trust anyone else the way we trust each other. He says he has never felt safety like this before. I have, but it's been a long time since then. Our ability to be vulnerable with each other is what brought us together as two in love, and is the core of our marriage. I think divorce would change me irrevocably. I can't be like this with anyone else again if my trust proves to be misplaced. I can't do it. However, in him, I believe I have found someone worthy of my trust, and my faith, and that from a risk-management perspective, this love is a great investment.
If it works for you this way, why do you say it's unhealthy? Just wondering. Sounds like a good thing to me.