From a certain point of view I think it could be argued that, even if you aren't losing a scene, you are losing content by opting out of sharing. E.g. if the game had not sharing, the boob-job that Zahra gives to Igor would have been given to Zaton instead (or the dev times spent creating those animations would have been repurposed toward some other content), so ultimately the player who chooses not to enable sharing is still getting “less” than if sharing wasn't in the game to begin with.
In general it's not a tit-for-tat in that case. It doesn't mean that if the Igor part was not in the game, the Zaton part would be twice as big. It could very well be 50 renders of Zaton riding a camel in the desert for all we know.
There's not a quota of "sex renders" we allocate on each update where sharing and other kinks have to fight for a share of the pie.
That said, your premise of "if this didn't exist, the time could be spent to other things I enjoy more" may be sound, but it's also flawed in the sense this can be said about any kink in the game. Hell, any
aspect of the game.
- "Why does the dev spend time on gory scenes, people don't like it and it's a waste of time".
- "Why is watersports in the game, eww. Maybe the dev could use the time to make something else."
- "Why is the MC a rough idiot, I'd prefer more wholesome love."
- "Why is the MC having a loving path? Plenty of games for that, make it rough only."
- "Why is the MC even leaving the house in the first place? He should stay there 24/7 and sex everyone. Pointless roaming around renders."
You see, if we based our thought process on all of these we'd end up making a big ball of nothing.