Some people don't like it when a game has an optional NTR route.
Because - and let's just use an easy to imagine example:
Imagine there's a pizza place in your town, that makes pizzas that you mostly love, except for the fact that every time you order a pizza, a portion of said pizza is covered in toppings that absolutely disgust you. And you never know how much will be covered in said toppings. Sometimes you'll get lucky and it'll be almost entirely edible, but other times you'll order it and get a fully inedible pizza.
That's what adding an "optional NTR route" does to a vanilla/harem game for most vanilla/harem enjoyers. Because one update may be purely harem focused, but then the next one will be all NTR, with many being at least some NTR thrown in there. And in the end, they're only getting half of a game, if they're lucky, and they're always having to wait longer for the harem/vanilla content they actually want to see because the dev is - in their minds - wasting time on NTR crap that they do not care about at all.
Imagine waiting three months for an update to a game, and finding out it has literally nothing for the route you are playing, so you have to wait another three months for another update in the hopes that the next update will maybe have some content for the route you are playing. Now imagine this happening multiple times, on multiple different games that have tried to do this "multiple routes" thing. Now imagine seeing this happen over, and over, and over, only for it to inevitably end in games either being abandoned, or just fade into obscurity with longer and longer waits between updates (I'm looking at you Taffy Tales).
They're less upset about the NTR being in the game, as they are about it otherwise seeming like a potential vanilla/harem game they might actually enjoy that they don't want to see ruined by what "optional NTR routes" can do to a game.
"
