Basically, the feeling is that they can be just as miserable as the rest of us.
Let them go through a divorce and the Rich Preener that married the guttersnipe can watch half his or her fortune disappear.
Let them think that all marriage is as shown on TV.
They'll find out why divorce rates are so high and why so many divorcees tend to co-habitate rather than re-marry.
Oh. The tax code's Marriage Penalty is still alive and well also.
When that young Adonis disappoints you just can't kick him out the door or pawn him off on one of your enemies. It's a lot more expensive than that. And if you're really stupid you'll have kids to fight over-and Child support.
Have at it.