Remember that we're playing a game in the process of development, so things can be added all out of the order that they might normally be experienced when the game is complete. For example, Harboring a Fugitive is balanced to be completed before Njorhaalt, while in the real world the resolution of that quest wasn't implemented until a month or so after the Palace of Ice dungeon was implemented, so anyone playing the game through the whole process would be overleveled for the Centaur Village sequence simply because that's the order the content arrived in.
RynQuest was implemented before the post-imprisoning stuff could be written, so you have to make the choice because the devs can't well hold up the entire storyline for one set of optional post-quest content to be written. That wouldn't be fair to everyone who wrote for RynQuest, the fans who wanted to see it or the person writing Gytha's content.