Bullshit.
You were doing fine until you said that he'd leave.
I'm quite introverted, and you look at my articles and decide for yourself whether I'm intelligent or well-traveled or have a wide range of skills.
And I've been married to my Darling for 27 years. We're still newlyweds. Everyone we know - including our sons, both married now - wishes they'd have the kind of marriage we do. We've got that brass ring that everybody else riding on the marriage-go-round hopes to grab.
Maybe what you described happened to you, but I'd venture to guess that either you got the exception rather than the rule...or there's more to the story than that. Please understand that I do not mean this as an insult, but I suspect it may be the latter.
I say that because most such people know the value of a happy marriage, and would be loath to give it up on a whim, or just because they hit a rough spot. If such a man has a truly happy marriage and then just decides to leave one day, then chances are he isn't that intelligent to begin with.
Addendum: I would also suggest that you provide more of a definition for intelligence, for there's a lot more to intelligence than skills for work and communication. Emotional intelligence is every bit as important.
For instance, the great physicists Einstein and Oppenheimer were womanizers, as were two of my favorite authors (Asimov and Heinlein). They were all scary smart when it came to matters of science and technology, but when it came to matters of the heart, maybe not so much.