I think this is a pretty tough situation... I personally don't believe in "Marriage". And when I say I don't believe in marriage I mean two main aspects.

• On the one hand, the ritual, going to church and the whole show. I don't believe in that religion, I even consider it the worst thing that can exist. So I consider it totally stupid to have a wedding with a party, church, veil and bouquet of flowers 💐 (I respect those who live in their illusion, but I consider it a purely religious act, and if you are guided by that religion, you are going through life well asleep, and if you are not religious and still do the ritual for the photos and what others say, then you are stupid).
• And secondly, the issue you mention. Marriage certified by the State. There is another option that also seems crazy to me. Letting the state get its hands on your assets, and your whole life afterwards if something goes wrong. And obviously it happens in many cases of wives who take advantage of that signed contract to then harm or literally together with the state steal what you have achieved, many times what was achieved within the marriage and sometimes even what was not achieved within the marriage.