So many times, I see men posting that the ex-wife got "half of everything HE owned". No. Assets acquired during the marriage belong to both whether or not the wife worked. Even if she did not have a paying job and if, by mutual consent, she stayed home to raise the children or provide other support for his career, her contributions should not be dismissed as worthless. So, the wife got "half of everything THEY owned." The same applies if the sexes are reversed, though that is still less common.
Maybe I am wrong, but I don't think anybody was suggesting that there was some gender issue at play here; other than the fact that most of the members of this forum are male and therefore the former spouse would be a wife.
I will throw in my anecdote as well. I do agree that what is earned during marriage is community property and no spouse's contribution should be dismissed as worthless, but sometimes that doesn't make it any easier to swallow. In my case, I put my ex-wife through dental school. She wasn't a SAHM who did all of the housework or shopping, she was a student who did almost none of the household work (because she was focused on her studies, which was a necessity and an agreement between both of us). After 4yrs of marriage in which she had not earned a penny of income she left completely debt free, with a $150k degree I paid for which set her up to make significantly more than I do, a car I had paid for, half of everything we saved during that time period, literally all of the household stuff, and we then fought almost a year over my assets which I had accumulated before we were married (in the end, she didn't get a penny of this). I didn't get anything because she now had the potential to make significantly more than me. I should have better prepared myself; I came into the marriage with ten years of savings from a decade of LBYM and a career, she came into the marriage with debt and without current job prospects. I accept it now, but it sucked and set my financial plans back a decade (and pushed hers a decade forward).
At the time we wed, I would have said what many of the posters have; that if we were to divorce, I loved her enough that I would gladly give her half of everything. That a prenup was planning for failure and I should know my potential spouse well enough for that to never be an issue. You think you know someone, but people change and divorce brings out the worst in everybody.
I would not get married again without a prenup. I did get married again last November, she balked at first, but after a few conversations about it she began to understand why and agreed to sign it. I won't put words into the mouth of my wife, but I highly doubt she would say now that insisting on a prenup was in any way showing a lack of trust in her or our marriage.