The problem isn’t architecture or music — it’s that every denomination you listed is still just different branches of Christianity.
If The Sims ever adds religion, it can’t be only Christian denominations. That wouldn’t be “diversity,” it would be Christian‑centric design.
Real diversity means including multiple world religions, not just variations of one. And once you open that door, you have to represent all of them fairly — Islam, Judaism, Hinduism, Buddhism, Sikhism, Indigenous religions, folk religions, and more.
That’s exactly why The Sims has always used fictional religions instead: they avoid real‑world conflict, they’re easier to moderate, and they let players enjoy cultural flavor without dragging actual sacred traditions into a sandbox game.
If the goal is cultural variety, fictional faiths inspired by real traditions are the safer and more inclusive option.