If a man doesn't want any children, there is no longer benefits or any good reason for him to get married.

Not to say you need to be in a marriage to have children, but I think it goes without say that it's best for a child to be raised in a family environment.

With the speculation that a man is more than likely to lose half his money, if/when the marriage doesn't work out - what GOOD reasons are left that can benefit a man when getting married?

Last I checked, you can virtually almost get anything from a normal LTR that a married couple would get.