I do have a prenup agreement.
And if you insist on seeing marriage as merely a financial contract with the state, then you are wrong about that anyway. It is not laid down in law clearly at all how spouses are meant to deal with money through their marriage. Nowhere does it say all money is pooled on marriage. That is just a norm some people in our society at this time have decided. And nowhere in history has marriage clearly dictated via the state how money is managed. Other than sexist laws, in some countries, that dictate all the control is given to the man.
Even in the old days when rich noblemen would marry, the money didn't all become accessible to the woman! Yes she would be supported, generally given a spending allowance (dictated by the man's generosity and choice, rather than the state)... but the man's money remained his, with full discretion over spending, in accounts in his name, free to whittle it away on gambling or other women, and leave it to whoever he wanted (normally a male heir). The women would need to negotiate for a dress allowance.
Even in the situation of divorce it is not laid down by the state who gets what. Yes, there is a norm of 50-50 split after a long marriage, but this is debated in court in huge detail, with numerous criteria around length of marriage, children, sacrifices each spouse has made, career prospects and ability to support themselves, aid they have given to each others careers and inheritances they have received. Essentially the courts try to work out what is fair. The marriage alone mandates almost nothing.
I think it's a bizarre way of thinking that marrying is about only making a financial contract via the state.... especially when legally marrying defines almost nothing about the management of money.
The vows one makes on marrying are love vows, not declaration of financial commitments!