Being a ghost-hunting game and an NTR game are not mutually exclusive. Games can have dozens of different tags that describe them. It is much more ethical to include all potential controversial tags in the description of a game; that way, customers don't purchase something they would not be into hence why Dlsite, the biggest online h-game store, has an extensive tag system.
Btw your example with Goblin Slayer isn't that great. Anime and Hentai are two different forms of entertainment that hardly exist in the same libraries unless you deliberately search it out. And a rape disclaimer for goblin slayer would not be incorrect as it occurs in the first 10 minutes of the show. So no misleading is occurring, if anything its probably a good thing to include that way it doesn't cause issues for someone that has experienced sexual assault irl so they could avoid it.
Like I said before a better example was purchasing a beef burger and receiving a vegan burger.
And yeah I guess the west is selfish since we live in cultures where customer rights are protected. I'm sorry if your country doesn't have that, getting scammed is not fun.