This is more or less a complaint about the contrivances and limitations that are inherent in this genre of videogame.
One might also ask why, in the first act, the ritual to close off the grove, which is stated to be a time sensitive issue in dialogue, will never be completed no matter how long it takes the player to get on with the questline. It's a sacrifice of plausibility and narrative urgency in favor of player agency, a tradeoff.
It isn't realistic that such a diverse group would all happen to be sexually fluid and open-minded, it's a contrivance that favors giving the player the most options, maybe not pulled off with the most grace in this particular game, but I still think player agency was the correct thing to give preference in this case.
