that's because some games have different route to please different kind of people (and potentially sell the game to more people) but it's not an obbligation. some of the best ntr game i have played in my life (ntrpg2 and thug hero party) have only 1 ntr routes, because that's the story, and in an NETORARE game (not netori or netorase, it's important) i EXPECT and REQUIRE to be cuked for all the game, that's is what i search in a netorare game.
wrong, that's exactly what netorare mean, mc is cucked, nothing more. obviously u can add whatever u whant after that; different route, ending etcc to please other people, but it's a different topic.