I generally agree. Most people have had numerous bad experiences of all types in their live. More people need to learn to accept outcomes, learn from the experience, and get on with their lives. For people who've had exceptionally bad experiences this may take some strength of will and character, but those are good properties to have and experience is always useful if used constructively.
As a more general comment on this topic, I do find that there is a dirth of women that a sane man would consider "marriageable" in the current social climate -- most women I meet seem to be bringing very little to the table these days. I bring a number of things to the relationship table: Great personality, intelligence, integrity, money, status, ambition. I expect a woman to bring her own set of assets that complement and leverage my assets and vice versa. Instead, most women I meet seem more interested in "coming along for the ride" than being an active partner in my life and business. I like strong, independent women, but many women who claim to have these attributes in popular society really only have strong personalities and are otherwise parasites. Most women assume that I'm looking for an arm decoration and sex partner (a perception which is probably men's fault to a certain extent), but there are so many women that are willing to be such that it is time consuming to wade through it to find a woman I could consider a real partner.
I'm a young-ish guy who doesn't really have any problems meeting women, so I'm sort of one of those people in the group being discussed, but I'm struck by how many women are essentially offering nothing more than sex in a relationship. I'm not looking for sex in a relationship per se, but for a strong partner. I can't see putting my not inconsiderable assets on the legal chopping block merely for a sex partner.
In this sense, I do think one could argue that the value proposition of marriage for men has disappeared in the current market (such as it is). Just to throw more fuel on the fire, I do find that there is a higher "hit rate" with women from certain cultures than others. I find, for example, that culturally Asian women (as a broad demographic group) have a much stronger sense of "partnership" in a relationship than American culture at large these days.
Sorry about the long-windedness. :-) In my own searches and lessons learned I've thought about this issue a lot. I think both men and women need to remember that it is about finding a partner, not a "lover" or whatever.