Remittance and Privacy on Ethereum

I notice they are some projects like Daimo and GetClave who are trying to build a seamless UX for onchain mobile payment. Coinbase is trying to incentivize remittance activity with free transfer of USDC on Base. Yet all of them are built on public blockchains where everything is, public. Personally I won't use stablecoins if the barista will know my balance after I bought some coffee, even if it's not my main wallet. Do you think retail banking is really possible with these public chains?

P.S. I'm aware of privacy rollups, mixers, and stealth addresses (shoutout to UmbraCash). But afaik none of them are actually being used for remittance right now.