The author is saying that Sayuri is "intelligent" even though at no point in this book it has ever been shown that she is. It's Shigure that's been shown to be this. Then again, maybe being smarter than a brick is considered intelligent to a male as they thing women are "stupid" in the first place.
Also this is throwing women at a male that treats them like trash and she won't give up on his shitty ass. Because of course she won't.
Males get women tosses at them all the time and they can treat them like trash and they'll still love them.
Women just get tosses all the trash males and are expected to love them.
Males can have no time for a relationship, women on the other hand must stop their life for a man.
Also Guren SHOULD have been weak after a month in a coma but of course he wasn't