Yes, Rowan''s decision make a lot of sense in a "hedge against future disasters" way to me for all members of the family.

I suppose I also don't judge it so harshly because what future does lie in front her? Taking on the farm will give her a lot of autonomy over her life. Presumably the job market (such as would have been open to her) would be rather full of demobilized men? A life as a games mistress keeps her cooped up in a hierarchy that she seems to call bullshit on regularly even at a young age. And marrying well for her comfort also doesn't seem like her scene.