I disagree, wholeheartedly, with this statement. A wife , or a husband is not a temporary thing. If you go into the marriage with that mindset, she will, indeed, be temporary.
It usually take two people to screw up a marriage. My wife and I have been married for 38 years, and we dated for 2 years before that. 40 years we've been together. I'm not claiming it was easy, without issues, or any such nonsense, but it is what you and your spouse make of it. I firmly believe that my wife and I are closer, now, than we've ever been in our relationship.
It's not "temporary", you (collectively) make it temporary.