The first posts of our newcomer here were phrased reasonable and within good taste. One is free to ask, question and criticize the tags their new game has.
Naturally, as soon as the veterans gave clear answers on how the game is structured, further discussion and justification becomes a waste of everyone's time and it drifts away from the game and becomes off topic. Whether we delve in the personal taste or now go in length about historical context how incest is or is not natural. So why elaborating further on it, both sides (I don't like incest vs I like incest) have stated their case. What more can everyone hope to accomplish now?
It's reasonable to have an initially other impression of the game. At its start, we play a chad in middle age setting, who we play fucking married women, mythological creatures like Dyrads and Vampires, and young women like a naive villager girl or an elven thief. So the matter that an enormous amount of the game focuses on the main love interests who are related to MC isn't communicated at first.
The incest only starts with Elins introduction, and in this regard it could be easy to assume she is the only option, a twin sister from childhood days, which isn't that uncommon of a japanese anime trope. The next one is Cass, and she gives huge european royal incest vibes, being a ruthless ambitious throne aspirant. It's possible to see her as an antagonist and trap, someone the game doesn't recommend you to pursue at all.
Granted, after the queen and Lia enter, the incest focus can't be overlooked. But even then it distracts by shifting the focus on two new love interests with the forced marriage and their rivalry.