You have a point, but in this case the author of the article says:

> I was a bit of an oddity in that I was anticipating marriage since early adolescence; that outsized-value for relationships came with what I feel were comparably overgrown feelings of loneliness. I got absurdly lucky when I found my wife, but I spent every day without her more or less miserable. It’s arguable she’s the only reason I’m able to be happy.

So it's not old age, but youth in his case that was unhappy until he met his wife. That does look like a red flag to me. Suppose his marriage goes south, will his (ex) wife now be responsible of not only ending the marriage, but also of ending all possible happiness in his life? That's an unreasonable burden to place on her.