Cashu is used in order to not have to download an external app or set up a lightning address yourself. It’s great for offline payments, it’s private, and it’s simple to convert to sats (copy and paste mint url into a wallet like nutstash, which only needs to be done once, copy paste the token, and redeem with lightning).
I completely agree that the experience can be more streamlined. We’re working on building a wallet and one-click redemption to easily redeem received tokens with lightning. We’re also going to add different payment methods so Cashu isn’t necessary for new users to learn.