It doesn't always have to be this way. First off, as
@EyeBRollin suggests, in this day and age, you are not her first choice. The contrapositive of that is that she's probably not yours either. The keyword is compromise. However, as a backup, one needs a pre-nup and a few separate accounts to keep on the side. Gold or Crypto is preferred. Since many females earn more than dudes these days, alimony is not really that big of a deal. However, in the pre-nup, waiver of alimony, legal fees and medical fees/premiums should be included. It's still a very dicey situation.