I understand this way of thinking. I also think about all the young marriages, arranged marriages, and lasting marriages between partners who were not ready, or were not wealthy, or had plenty of problems (addiction, abuse, infidelity, immaturity, etc, etc).
When you consider all those things, it makes you wonder if all our notions of what constitutes marriage availability are really just generational, cultural, and otherwise personal opinions and feelings on the matter. There's a good chance when put under scrutiny that really the only different between people who are married and those who are not is their choice to be.
I could have been married. Honestly, I probably could have been married dozens of times. However, I neither put that particular person/relationship, nor the simple fact of being married, above other priorities (Is this what God wants? Will I be happy? How does my family feel about this? Etc etc etc).
A lot of what's behind me saying this is people who have come to similar understanding about our present marital atmosphere versus what generations past experienced. In the words of some elderly coworkers, friends, etc... "Back then, our parents and grandparents stayed together whether they were happy or not...loved or not. You just didn't get a divorce no matter what, but that all changed during my generation (these people being around 60s to 70s, so we're talking baby boomers)."