Ok, sorry you feel that way. I feel it fits the narrative of the game since it's a heavy corruption based game. Find it strange you can't ignore optional content (especially content that isn't being delivered any time soon), but each to their own ^^
Options don't exist in a vacuum.
The protagonist isn't a cipher, the game has clearly given him an arc and frame to work the story towards so he deciding to let HIS women get fucked in a brothel adds to he character and so even if I don't select that option your narrative doesn't change: the MC personality makes it so he is okay with letting others fuck them so it's irrelevant If I choose to let the fuck scenes plays out, he is still a cuck because that's established by the choice as part of his personality.
Think of how users wanted the girls in Solarion to give up their monogamy desires and let MC somehow alter their personality, it was even suggested it to be optional but you didn't like the narrative implications, same here.
And since when corruption means you being you okay with being a cuck?
Most of the corruption games I've played the protag doesn't even think and even abhorred the idea of other guys touching their women. Though they are mostly japanese so I guess western devs have a more pathetic idea of what corruption entails.
Yet another game ruined by the brothel meme.