First, I'd advise not to place too much "must have" importance on CHA checks, or any other single skill specialization in this game.
As benbaxter just pointed out, there are *so* many other ways of getting your way in conversations.
Charisma checks are by far the most common, sure there are other types of checks, I've even seen religion pop up once or twice but charisma is by far the most reliable way to have influence in most conversations. Wisdom checks are probably next but those are tadpole relates and I don't know if it's a good idea to lean into that too much.
