I actually despise this genre rule

I used to hate isekai until I learned about slice of life Isekai which is peak fiction such as: "Uncle from another world" "Isekai Izakaya (Japanse pub)" "reincarnated as a vending machine" "Restaurant to Another World" "Ascendance of a bookworm" etc, etc, and on into infinity. If you have something you like as a slice of life series, there is probably a pretty okay isekai version of it.