I can’t help but wonder if Itch is intentionally going for a malicious compliance route. As you say, it’s tougher to defend rape and incest content, so if they’d opened with that they likely wouldn’t have gotten nearly as much media attention. But by doing it this way, half the internet is talking about payment processors forcing itch to delist NSFW games, even giving juicy headlines like LGBTQ games being disproportionately affected. Then Collective Shout of all groups was forced onto the back foot and forced to say “wait no we just wanted the rape and incest games gone” but now that the story is out there it has a life of its own.
Even if they didn’t do it on purpose, it seems like it’s created a much more effective movement than if they had done it “properly”, regardless of the reason for why it worked out this way.
If your bank app requires Play Integrity check Graphene will register as an unofficial OS, installing play services doesn’t fix it. That said, only some banks ban custom ROMs via Play Integrity.