While being independent is important, this view of marriage outlined above is as cynically extreme as a purely romantic basis. Why not just date instead of marriage, especially if for some reason you cannot trust your partner?
Why would you even want to be with someone you cannot trust?
It takes hard work for couples to build and maintain a marriage in this society. And the key to a healthful marriage is trust.
If you fear your partner will exploit you, perhaps you would do well to work on that internal fear within you before marrying? And that ensuing authenticity and autonomy will perhaps grant you the security that would otherwise be sadly misplaced in a litigious prenup.
My 2c.