Option yes but turning the futa/trans into a woman ruins it for some of us who likes futa/trans in games.
I can understand that.
It's like when they add NTR to a game but make it an "option", its mere existence as an option ruins the game for some people.
Still, given the reality of wanting to appeal to the largest possible group of players, it is probably true that *IF* you are going to add something divisive like Futa/Trans or NTR, then having it as an "option" is probably the best compromise.
I know I for one, will play a game that has content I dislike as long as it is only an option and avoidable.
But I refuse to give money to a developer who makes this because I will not pay towards the creation of content I will never play.
As to Xcribr, I really enjoyed "A New Home" and actually $upported it (the game is finished now). I will not however be doing the same for this title, regardless of the NTR/Not-NTR (As distrusting of game developers as I ususally am, I would actually trust Xcribr if they said that there was "No NTR" until I played it for myself), I won't support this game (and will likely be wary of $upporting Xcribr in the future) because they added Futa/Trans tag.
Still Dev's are free to make what they want, just as I am free to say 'nope' to giving $upport.