Lol, maybe but ntr, etc is made for western audience more as it sells easily
Never. NTR and its variations are easily top 3 porn / hentai most famous genres in Japan and East Asia in general.
On western audience, NTR and its variations are mostly hated. Just do a quick search on any vanilla game, and any NTR game on patreon or subscribestar and you'll see the HUGE number difference and supporters. Even here on F95 if you like at the amount of ratings/reviews each game style have.
NTR was NEVER meant for western audience, the devs who do it, are focusing on getting a more stable and loyal fanbase for a steady financial support (since the majority hate it, the games that have NTR are well protected by its community because they know they'll hardly get good writing, renderring/art on this genre. So devs can brutally milk it if they want to be stupid), or just because they like the genre.