Well, getting married does enable you to throw feasts, which is very useful if you're aiming to have your own kingdom.
I've posted this before, but there are several advantages to playing as a female character:
- You're not constantly losing relation with kings because you keep rejecting their offers of vassalship.
- You don't have to suck up to a guy and his daughter/sister in order to get married.
- You don't have to come up with a dowry or wait until you get a castle/town to get married.
- You don't have to memorize any bad poetry.
- You'll never have to duel anyone over a love affair.
- As long as you're married, rebelling and keeping your properties is easy.
- You can garrison troops in any property your husband owns, free of charge. You can also take troops from his properties.
- You can steal high-value prisoners from his properties as well, and you get the ransom!
- You're guaranteed at least 1 vassal for your kingdom right away.
The one in bold writing is the chief advantage of playing as a female character, and what the wiki means when they say you can use a husband as a political tool: Join a faction, get married, and rack up a bunch of fiefs together with your husband. Once you're rich enough and have a lot of properties between the two of you, convince your husband that you really should be Queen of Calradia, and you've instantly rebelled with all the properties you jointly own, and with your husband as a vassal. No need to wait to get rejected for a fief, no need to lose your properties. Or, take up a claimant's cause, convince a lord to join the cause as well and marry him, and have the claimant assign all fiefs to you and/or your husband. Then, tell the claimant you don't think their rebellion will succeed and withdraw. Now you've got most of their territories and you've weakened both the original faction and the claimant's faction, so they're easy to conquer. If you have the Diplomacy mod, you can also marry a claimant directly, but then you don't get to rule personally.