Not sure if it's the same in the US, but in Australia women can nick half or more (tends to be 60%) of your stuff (including superannuation) even if you're NOT married through the joys and wonders of a de facto relationship.
I've got a mate going through this exact scenario right now, never married, lived with this woman for two years. She decides she wants to move back to England and sends the lawyers after him for a large slice of his superannuation.
There are personally no advantages to marriage for me.
I can't find an "equal" in real life. I'm very successful play music, draw and research and I can't find a woman that genuinely is interested and excels in these unless it's for some superficial value.
It's like we're biological different.
All well and good, but when the system itself becomes unfair, I just can't get myself to swallow the pill.
Sayonara mofos.
My career, surrogacy or have family in a less misandrist society.
70%+ of divorce is by women and men pay 98%+ of alimony.
No thanks