My solution is this: Know who you're getting married to, and if you have any doubts like this, don't get married.
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Things change, people sometimes change with them. Life can get suddenly harder at 35 than anyone could have imagined at 24 and not every marriage between two good people can stand up to the strain.
The article doesn't reference men on a second trip around the park. They may well have life experience that compels them to hedge their bets before getting back on the ride.
I do agree though that some of these measures seem so cynical that the guys taking those precautions should probably not get married, but not for their sakes....they'd be doing the woman a favor by stepping down.